Simple pencils, differences. What is a pencil? This is a kind of instrument that looks like a rod made of writing material (charcoal, graphite, dry paints, etc.). Such a tool is widely used in writing, drawing and drawing. As a rule, the writing rod is inserted into a convenient frame. pencils can be colored and "simple". That's just about such "simple" pencils today we'll talk, or rather about what types of graphite pencils exist. The very first object, vaguely resembling a pencil, was invented in the 13th century. It was a thin silver wire soldered to the handle. They kept such a "silver pencil" in a special case. To draw with such a pencil, remarkable skill and skill was required, because it was impossible to erase what was written. In addition to the "silver pencil" there was also a "lead" one - it was used for sketches. Around the 14th century, the "Italian pencil" appeared: a rod made of clay black slate. Later, the rod was made from burnt bone powder mixed with vegetable glue. Such a pencil gave a clear and color-saturated line. By the way, this kind of writing instruments are still used by some artists to achieve a certain effect. Graphite pencils have been known since the 16th century. Their appearance is very interesting: in the Cumberland area, English shepherds found a certain dark mass in the ground, with which they began to mark sheep. Since the color of the mass was similar to lead, it was mistaken for metal deposits, but later they began to make thin sharp sticks from it, which were used for drawing. The sticks were soft and often broke, and dirty hands, so it was necessary to put them in some kind of case. The rod began to be clamped between wooden sticks or pieces of wood, wrapped in thick paper, tied with twine. As for the graphite pencil that we are used to seeing today, Nicolas Jacques Conte is considered to be its inventor. Conte became the author of the recipe when graphite was mixed with clay and subjected to high temperature treatment - as a result, the rod was strong and, in addition, this technology made it possible to regulate the hardness of graphite.

Lead hardness Lead hardness is indicated on the pencil with letters and numbers. Manufacturers from different countries (Europe, USA and Russia) have different markings for the hardness of pencils. Rigidity designation In Russia, the hardness scale looks like this: M - soft; T - solid; TM - hard soft; The European scale is somewhat wider (marking F does not have a Russian equivalent): B - soft, from blackness (blackness); H - hard, from hardness (hardness); F is the middle tone between HB and H (from the English fine point - fineness) HB - hard-soft (Hardness Blackness - hardness-blackness); In the USA, a number scale is used to indicate the hardness of a pencil: - corresponds to B - soft; - corresponds to HB - hard-soft; ½ - corresponds to F - medium between hard-soft and hard; - corresponds to H - solid; - corresponds to 2H - very hard. Pencil pencil strife. Depending on the manufacturer, the tone of the line drawn with a pencil of the same marking may differ. In Russian and European marking of pencils, the number before the letter indicates the degree of softness or hardness. For example, 2B is twice as soft as B and 2H is twice as hard as H. Pencils are commercially available and are labeled 9H (hardest) to 9B (softest). Hard pencils Start from H to 9H. H is a hard pencil, hence the thin, light, "dry" lines. With a hard pencil, draw solid objects with a clear outline (stone, metal). With such a hard pencil, according to the finished drawing, over the shaded or shaded fragments, thin lines are drawn, for example, strands are drawn in the hair. The line drawn with a soft pencil has a slightly loose contour. A soft lead will allow you to reliably draw representatives of the fauna - birds, hares, cats, dogs. If it is necessary to choose between a hard or soft pencil, artists take a pencil with a soft lead. An image drawn with such a pencil is easy to shade with a piece of thin paper, a finger or an eraser. If necessary, you can finely sharpen the graphite core of a soft pencil and draw a thin line similar to the line from a hard pencil. Hatching and drawing Strokes on paper are drawn with a pencil inclined at an angle of about 45 ° to the plane of the sheet. To make the line bolder, you can rotate the pencil around the axis. Light areas are shaded with a hard pencil. Dark areas are correspondingly soft. It is inconvenient to hatch with a very soft pencil, as the stylus quickly becomes dull and the fineness of the line is lost. The way out is to either sharpen the point very often, or use a harder pencil. When drawing, they gradually move from light to dark areas, since it is much easier to darken a part of the drawing with a pencil than to make a dark place lighter. Please note that the pencil must be sharpened not with a simple sharpener, but with a knife. The lead should be 5-7mm long, which allows you to tilt the pencil and achieve the desired effect. Graphite pencil lead is a fragile material. Despite the protection of the wooden shell, the pencil requires careful handling. When dropped, the lead inside the pencil breaks into pieces and then crumbles during sharpening, making the pencil unusable. Nuances that you should know when working with pencils For hatching at the very beginning, you should use a hard pencil. Those. the driest lines are made with a hard pencil. The finished drawing is drawn with a soft pencil to give it richness and expressiveness. Soft pencil leaves dark lines. The more you tilt the pencil, the wider its mark will be. However, with the advent of pencils with a thick lead, this need is no longer necessary. If you do not know how the final drawing will look like, it is recommended to start with a hard pencil. With a hard pencil, you can gradually dial the desired tone. At the very beginning, I myself made the following mistake: I took too soft a pencil, which made the drawing dark and incomprehensible. Frames of pencils Of course, the classic version is a stylus in a wooden frame. But now there are also plastic, varnished and even paper frames. The lead on these pencils is thick. On the one hand, this is good, but on the other hand, such pencils are easy to break if put in a pocket or dropped unsuccessfully. Although there are special cases for carrying pencils (for example, I have a set of KOH-I-NOOR Progresso black lead pencils - good, solid packaging, like a pencil case).

What could be easier than a pencil? This simple tool, familiar to everyone since childhood, is not as primitive as it seems at first glance. It allows you not only to draw, write and draw, but also to create a variety of artistic effects, sketches, paintings! Any artist must be able to draw with a pencil. And, more importantly, understand them.

Graphite ("simple") pencils are pretty different from each other. By the way, "pencil" comes from two Turkic words - "kara" and "dash" (black stone).

The pen's nib is set in a frame made of wood or plastic, and may be made of graphite, charcoal, or other materials. The most common type - graphite pencils - differ in the degree of rigidity.

Let's start!

Pavel Chistyakov, professor at the St. Petersburg Academy of Arts of the 19th-early 20th century, advised to start by putting paint aside and practicing drawing “with a pencil for at least a year.” The great artist Ilya Repin never parted with pencils. Pencil drawing is the basis of any painting.

The human eye distinguishes about 150 shades of gray. An artist who draws with graphite pencils has three colors at his disposal. White (paper color), black and gray (color of graphite pencils of different hardness). These are achromatic colors. Drawing only with a pencil, only in shades of gray allows you to create images that convey the volume of objects, the play of shadows and glare of light.

Lead hardness

The hardness of the lead is indicated on the pencil with letters and numbers. Manufacturers from different countries (Europe, USA and Russia) have different markings for the hardness of pencils.

Rigidity designation

In Russia hardness scale looks like this:

• M - soft;
• T - solid;
• TM - hard-soft;

European scale somewhat wider (marking F does not have a Russian equivalent):

• B - soft, from blackness (blackness);
• H - hard, from hardness (hardness);
• F is the middle tone between HB and H (from the English fine point - subtlety)
• HB - hard-soft (Hardness Blackness - hardness-blackness);

IN THE USA a number scale is used to indicate the stiffness of a pencil:

• #1 - corresponds to B - soft;
• #2 - corresponds to HB - hard-soft;
• #2½ - corresponds to F - medium between hard-soft and hard;
• #3 - corresponds to H - hard;
• #4 - corresponds to 2H - very hard.

Pencil pencil strife. Depending on the manufacturer, the tone of the line drawn with a pencil of the same marking may differ.

In Russian and European marking of pencils, the number before the letter indicates the degree of softness or hardness. For example, 2B is twice as soft as B and 2H is twice as hard as H. Pencils are commercially available and are labeled 9H (hardest) to 9B (softest).

soft pencils

Start from B before 9B.

The most commonly used pencil when creating a drawing is HB. However, this is the most common pencil. With this pencil draw the basis, the shape of the picture. HB handy for drawing, creating tonal spots, it is not too hard, not too soft. Draw dark places, highlight them and place accents, a soft pencil will help to make a clear line in the picture. 2B.

Hard pencils

Start from H before 9H.

H- a hard pencil, hence - thin, light, "dry" lines. With a hard pencil, draw solid objects with a clear outline (stone, metal). With such a hard pencil, according to the finished drawing, over the shaded or shaded fragments, thin lines are drawn, for example, strands are drawn in the hair.

The line drawn with a soft pencil has a slightly loose contour. A soft lead will allow you to reliably draw representatives of the fauna - birds, hares, cats, dogs.

If it is necessary to choose between a hard or soft pencil, artists take a pencil with a soft lead. An image drawn with such a pencil is easy to shade with a piece of thin paper, a finger or an eraser. If necessary, you can finely sharpen the graphite core of a soft pencil and draw a thin line similar to the line from a hard pencil.

The figure below shows more clearly the hatching of different pencils:

Hatching and drawing

Strokes on paper are drawn with a pencil inclined at an angle of about 45 ° to the plane of the sheet. To make the line bolder, you can rotate the pencil around the axis.

Light areas are shaded with a hard pencil. Dark areas are correspondingly soft.

It is inconvenient to hatch with a very soft pencil, as the stylus quickly becomes dull and the fineness of the line is lost. The way out is to either sharpen the point very often, or use a harder pencil.

When drawing, they gradually move from light to dark areas, since it is much easier to darken a part of the drawing with a pencil than to make a dark place lighter.

Please note that the pencil must be sharpened not with a simple sharpener, but with a knife. The lead should be 5-7mm long, which allows you to tilt the pencil and achieve the desired effect.

Graphite pencil lead is a fragile material. Despite the protection of the wooden shell, the pencil requires careful handling. When dropped, the lead inside the pencil breaks into pieces and then crumbles during sharpening, making the pencil unusable.

Nuances to know when working with pencils

For hatching at the very beginning, you should use a hard pencil. Those. the driest lines are made with a hard pencil.

The finished drawing is drawn with a soft pencil to give it richness and expressiveness. Soft pencil leaves dark lines.

The more you tilt the pencil, the wider its mark will be. However, with the advent of pencils with a thick lead, this need is no longer necessary.

If you do not know how the final drawing will look like, it is recommended to start with a hard pencil. With a hard pencil, you can gradually dial the desired tone. At the very beginning, I myself made the following mistake: I took too soft a pencil, which made the drawing dark and incomprehensible.

Pencil frames

Of course, the classic version is a lead in a wooden frame. But now there are also plastic, varnished and even paper frames. The lead on these pencils is thick. On the one hand, this is good, but on the other hand, such pencils are easy to break if put in a pocket or dropped unsuccessfully.

Although there are special cases for carrying pencils (for example, I have a set of KOH-I-NOOR Progresso black lead pencils - good, solid packaging, like a pencil case).

Today I will talk about the marking of simple pencils, about the most famous companies for their production, as well as how to choose them.
Pencils are completely different - wax, graphite, colored, charcoal, pastel, mechanical and even watercolor. Since childhood, we have been attracted to these art supplies, but over time, many people have a question - how to choose pencils.

Marking simple pencils by hardness

Ordinary graphite pencils have a marking that allows you to determine the degree of hardness (well, or softness). Bold(abbreviated B) - means fat, that is, soft. Hard(abbreviated H) - hard, hard.

The marking of the pencil is directly indicated by letters on the wooden part. A coefficient is placed before the letter of the stiffness designation - the larger it is, the softer or harder the pencil. In Russia, stiffness is denoted by letters T and M.
Pencils range from very hard to very soft. There are also HB pencils - the transition of hardness H to B. There is also a transitional form from H to HB, which is indicated by the letter F.

Colour pencils

The name speaks for itself - these pencils have a wide range of colors, with which you can create colorful drawings. The core of watercolor pencils is made of pressed watercolor paint, so when you blur the drawing with water, you get interesting transitions, just like when painting with watercolors. Pastel pencils, like watercolors, consist of pastels in a wooden shell, that is, they are no different from pastels, except that you can work out the smallest details in the drawing with their help.

Best Pencil Companies

The most famous company for the production of graphite pencils is the Czech company Koh-I-Noor. Indeed, these pencils are of very high quality, have a wide range of hardness, high-quality wood is used for their manufacture. Pencils Derwent softer than Koh-I-Noor, but, in my opinion, they are not inferior to them in quality. The real luxury for the artist can be called brand pencils Faber Castell.

How to choose a pencil

When it comes time to go to the store for new graphite pencils, we should pay attention to the fact that it is best to buy pencils in a package, and not by the piece, since with such a purchase the risk of running into a fake is reduced. Be sure to open the package, check each pencil to ensure that the lead is not brittle, and the wood is solid without nicks. Remember that real Faber Castell brand pencils have very good paint adhesion. If you notice flaws or cracks, then this is most likely a fake.

Application of pencils

In order to outline the drawing, you need a hard pencil, for example, 2H (Russian 2T). For hatching, a 2B pencil (Russian 2M) is suitable for you. To hatch the darkest part of our drawing, we will need a very soft pencil, for example 8B or 12B.

Pencils They differ mainly in the type and nature of the writing rod (which determine the writing properties of the pencil and its purpose), as well as in size, cross-sectional shape, color and type of wooden shell coating.

Since the 1950s, pencils have been produced in the USSR in accordance with GOST 6602-51. The quality was good. The current situation is rather sad. Let's talk about what happened before.

Pencils

Depending on the writing rod and its properties, the following main groups of pencils are distinguished: a) graphite - the writing rod is made of graphite and clay and impregnated with fats and waxes; when writing, they leave a line of gray-black color of varying intensity, depending mainly on the degree of hardness of the rod; b) colored - the writing rod is made of pigments and dyes, fillers, binders and sometimes fats; c) copiers - the writing rod is made from a mixture of water-soluble dyes and a binder with graphite or mineral fillers; when writing, they leave a gray or colored line, difficult to cut with an elastic band.

Stages of production of pencils from glued boards

Production of pencils consists of the following main processes: a) the manufacture of the writing core, b) the manufacture of the wood shell and c) the finishing of the finished pencil (coloring, marking, sorting and packaging). The composition of graphite rods includes: graphite, clay and adhesives. Graphite is very graded and leaves a gray or grey-black streak on paper. Clay is mixed into graphite to bond its particles, and adhesives are added to the graphite-clay mixture to impart plasticity. Screened graphite in vibratory mills is crushed to the smallest particles. Clay is soaked in water. Then these components are thoroughly mixed in special mixers, pressed and dried. The dried mass is mixed with adhesives, repeatedly pressed, turning into a homogeneous plastic mass suitable for molding writing rods. This mass is placed in a powerful press, which squeezes out thin elastic threads from the round holes of the matrix. Upon exiting the matrix, the threads are automatically cut into segments of the required length, which are the writing rods. The segments are then placed in rotating drums, where they are rolled out, straightened and dried. After drying, they are loaded into crucibles and fired in electric furnaces. As a result of drying and firing, the rods acquire hardness and strength. The cooled rods are sorted by straightness and sent for impregnation. This operation aims to give the rods, which after firing increased rigidity, softness and elasticity, i.e., the properties necessary for writing. For the impregnation of graphite rods, tallow, stearin, paraffin and various types of wax are used. For the manufacture of color and copy rods, other types of raw materials are used, the technological process is partially changed.

For colored rods, water-insoluble dyes and pigments are used as colorants, talc is used as fillers, and pectin glue and starch are used as binders. The mass, consisting of dyes, fillers and binders, is mixed in mixers, the firing operation falls out. The strength of the colored rod is given by the pressing mode and the regulation of the amount of binders introduced into the mass, and this, in turn, depends on the nature and amount of pigments and dyes. For copy rods, water-soluble aniline dyes are used as dyes, mainly methyl violet, which gives a violet color trait when moistened, methylene blue, which gives a greenish-blue color trait, brilliant green - a bright green color, etc.

The strength of the copy rods is regulated by the recipe, the amount of binder and the pressing mode. Finished rods are placed in a wood shell; wood should be soft, have low cutting resistance along and across the grain, have a smooth, shiny cut surface and even tone and color. The best material for the shell is the wood of the Siberian cedar and linden. Wooden boards are treated with ammonia vapor (to remove resinous substances), soaked in paraffin and stained. Then, on a special machine, “paths” are made on the boards, into which the rods are placed, the boards are glued and divided into individual pencils, while giving them a hexagonal or round shape. After that, the pencils are ground, primed and painted. Painting is done with fast-drying nitrocellulose paints and varnishes, which have a clean tone and bright color. After repeated coating of the shell with these varnishes, a strong varnish film is formed on it, giving the finished pencil a glossy, shiny surface and a beautiful appearance.

Classification of pencils

Depending on the source materials of the writing rod and the purpose, the following groups and types of pencils are distinguished.

1. Graphite: School, Stationery, Drawing, Drawing;

2. Color: School, Stationery, Drawing, Drawing;

3. Photocopiers: stationery

In addition, pencils differ in overall dimensions, in the hardness of the core, and in the finish of the shell. Dimensional indicators include: cross-sectional shape, length and thickness of the pencil. According to the shape of the cross section, pencils are round, faceted and oval. Some groups or types of pencils are assigned only one cross-sectional shape; for others, different ones are allowed. So, drawing pencils are produced only faceted - hexagonal, copying pencils - only round; stationery can have any of the indicated shapes, as well as a three-, four-, octahedral or oval cross-sectional shape. The pencils are 178, 160, 140 and 113 mm long (with a tolerance of ±2 mm for these dimensions). The main and most commonly used of these sizes is 178 mm, it is mandatory for graphite pencils - school, drawing and drawing; for color - drawing and drawing; for stationery colored pencils, a length of 220 mm is also allowed. The thickness of a pencil is determined by its diameter, and for faceted pencils, the diameter is measured along the inscribed circle; it ranges from 4.1 to 11 mm, the most common thickness is 7.9 and 7.1 mm.

According to the degree of hardness writing rod pencils are divided into 15 groups, designated by letters and numerical indices in sequential order: 6M, 5M, 4M, 3M, 2M, M, TM, ST, T, 2T, ZT, 4T, 5T, 6T, 7T. The letter "M" denotes the softness of the writing rod, the letter "T" - its hardness; the larger the digital index, the stronger this property is for a given writing rod. On school graphite pencils, the degree of hardness is indicated by the numbers No. 1 (soft), No. 2 (medium) and No. 3 (hard). On carbon pencils - in words: soft, medium hard, hard.

Abroad, the degree of hardness is indicated by the Latin letters "B" (soft) and "H" (hard).

Graphite school pencils were produced in medium hardness, drawing pencils - of all existing degrees of hardness, colored pencils of all types - usually soft.

Graphite drawing pencils "Designer"

The color of the wood shell coating is also different for different pencils; the shell of colored pencils, as a rule, was painted according to the color of the writing rod; for the shell of other pencils, each title was usually assigned one or more permanent colorings. The color of the shell was of several types: one-color or marbled, decorative, with ribs or edges painted in contrasting colors or covered with metal foil, etc. Some types of pencils were produced with a decorative head, which was painted in colors different from the color of the shell , with a plastic or metal head, etc. Pencils with plastic or metal tips, with an elastic band (only graphite), with a sharpening of the rod, etc. were also produced.

Depending on these indicators (properties of the writing rod, cross-sectional shape, overall dimensions, type of finish and design), different names were assigned to each type of pencils and sets.

Graphite drawing pencils "Polytechnic"

Assortment of pencils

Pencils are divided into three main groups: graphite, colored, copying; in addition, there is a special group of special pencils.

Graphite pencils by purpose are divided into school, stationery, drawing and drawing.

School pencils - for school writing and drawing classes; three degrees of hardness were produced - soft, medium and hard - designated respectively by numbers: No. 1, No. 2, No. 3.

Pencil No. 1 - soft - gave a line of thick black and was used for school drawing.

Pencil No. 2 - medium hardness - gave a clear black line; used for writing and drawing.

Pencil No. 3 - hard - gave a pale grayish-black streak: it was intended for drawing and initial drawing work at school.

School pencils included pencils that had a metal nipple in which a rubber band was fixed to erase notes made with a pencil.

Stationery pencils - for writing; produced mainly soft and medium hardness.

Drawing pencils - for graphic works; produced according to the degree of hardness of the writing rod from 6M to 7T. Hardness determined the purpose of the pencils. So, 6M, 5M and 4M are very soft; ZM and 2M - soft; M, TM, ST, T - medium hardness; ST and 4T - very hard; 5T, 6T and 7T - very hard, for special graphic works.

Drawing pencils - for drawing, shading sketches and other graphic works: available only soft, different degrees of hardness.

Assortment of graphite pencils

colored pencils according to purpose are divided into school, stationery, drawing, drawing.

School pencils - for primary children's drawing and drawing work of elementary school students; were produced in round shape, in sets of 6-12 colors.

Stationery pencils - for signature, proofreading, etc., 5 colors were produced, sometimes two-color - for example, red-blue, mainly hexagonal, except for Svetlana pencils, which had a round shape.

Drawing pencils - for drawing and topographic work; produced mainly in sets of 6 or 10 colors; hexagon shape; coating color - according to the color of the rod.

Drawing pencils - for graphic works; several types were produced, differing from school ones in length and in the number of flowers in sets, from 12 to 48, mostly round, except for drawing No. 1 and No. 2, which had a hexagonal shape. All sets had 6 primary colors, additional shades of these colors and usually white pencils.

All pencils produced in sets were packaged in artistically designed cardboard boxes with multi-colored labels.

Assortment of colored pencils

Copying pencils two types were produced: graphite, that is, containing graphite as a filler, and colored, the writing rod of which contained talc instead of graphite. Copying pencils were produced in three degrees of hardness: soft, medium hard and hard. Copying pencils were produced, as a rule, in a round shape.

Assortment of copying pencils

Specialty pencils - pencils with special properties of the writing rod or special purpose; produced graphite and non-ferrous. The group of special graphite pencils included "Carpenter", "Retouch" and briefcase pencils (for notebooks).

Carpenter's pencil was intended for marks on a tree when performing carpentry and joinery work. It had an oval-shaped shell and sometimes a rectangular section of the writing rod.

Pencil "Retouch"- for retouching photos, shading, applying shadows. The writing rod contained finely ground birch charcoal, as a result of which it gave a thick line of thick black color.

Four numbers were produced, differing in hardness: No. 1 - very soft, No. 2 - soft, No. 3 - medium hardness, No. 4 - hard.

Special colored pencils included "Glassographer" and "Traffic light".

Pencil "Glassographer" had a soft core, giving a fat and thick line; used for marks on glass, metal, porcelain, celluloid, for laboratory work, etc. 6 colors were produced: red, blue, green, yellow, brown and black.

Pencil "Traffic light" It was a type of colored pencils, had a longitudinally composite rod, consisting of two or three colors, which made it possible to get a line of several colors when writing with one pencil. Pencils were designated by numbers corresponding to the number of colors that the rod wrote with.

Names and main indicators of special pencils

Pencil quality

The quality of the pencils was determined by the conformity of the core, shell, finish and packaging to the requirements set by the standard. The most important indicator of the quality of pencils were: for graphite - fracture strength, hardness, intensity of the line and slip; for color - the same indicators and (color compliance with approved standards; for copiers - the same is the copying ability of the rod. All these indicators were checked with special instruments and in laboratory conditions. In practice, to determine the quality of pencils, the following requirements should be followed. The writing rod should have be glued into a wooden shell firmly and as accurately as possible in its center; the non-centricity of the rod was determined by the smallest, i.e., the thinnest part of the shell, the dimensions of which were established by the standard for pencils of the 1st and 2nd grades; the writing rod should not come out freely from the shell when sharpening a pencil or when pressing on it from the end; should be whole and uniform along its entire length, should not contain foreign impurities and inclusions that scratch the paper when writing, should not have any obvious or hidden cracks, should not was supposed to crumble when sharpening and writing.When sharpening a pencil, with a vertical pressing on the sharpened tip of the rod, the latter should not give chips, i.e., arbitrary breaking off or chipping of the rod particles. The cross-sectional area of ​​the rod at the ends of the pencil had to be even, smooth, without damage and chips. For colored rods, a line of the same color and intensity was required when writing along the entire length of the rod.

The shell of the pencils was made of good quality wood, without knots, cracks and other defects; should have low cutting resistance, i.e., it should be easily and softly repaired with a sharply sharpened knife, not break during sharpening and have a smooth cut surface. The ends of the pencils had to be cut evenly, smoothly and strictly perpendicular to the axis of the pencil. The pencil should be straight and even along its entire length, without deformation. The surface had to be smooth, shiny, without scratches, dents, cracks and varnish runs. The varnish coating should not crack, crumble and stick when wet.

According to defects in appearance, pencils were divided into two grades: 1st and 2nd; moreover, the writing properties for pencils of both varieties should have been the same. The 2nd grade included pencils in which the deflection along the length was not more than 0.8 mm, the chipping of wood or varnish film from the end of the pencil was not more than 1.5 mm, the chipping of the rod at the ends was not more than half the cross-sectional area of ​​the rod - to a depth not more than 1.0 mm, the non-centricity of the rod is not more than 0.33 D—d (D is the diameter of the pencil shell along the inscribed circle, d is the diameter of the rod in mm), as well as scratches, dents, roughness and sagging (width and depth not more than 0.4 mm) no more than 3 over the entire surface of the pencil, with a total length of up to 6 mm and a width of up to 2 mm.

Pencils were marked with bronze or aluminum foil on one or more faces. The marking had to contain the name of the manufacturer, the name of the pencils, the degree of hardness (usually in letters) and the year of issue (usually the last two digits of the corresponding year (for example, “55” means the release of 1955). On copying pencils, the marking contained the abbreviated word “Copy” On pencils of the 2nd grade, in addition, there should have been the designation “2 s.” The marking had to stick firmly to the surface of the pencil, be clear, legible, all lines and signs should be solid and not merge.

Pencils: Ruslan, Rogdai, Ratmir (factory named after Krasin)

Pencils were packed in cardboard boxes, mainly in 50 and 100 pieces of the same name and grade. Colored pencils for school and drawing were packed in sets of different colors of 6, 12, 18, 24, 36 and 48 colors in one set. Graphite drawing pencils, colored drawing pencils and some other types of pencils were also produced in sets of different contents. Boxes with pencils of 50 and 100 pieces and sets of all kinds were issued with a multi-color art label sticker. Boxes with sets and pencils of 10 and 25 pieces were placed in cardboard cases or packed in packs of thick wrapping paper and tied with twine or braid. Boxes with pencils of 50 and 100 pieces were tied with twine or braid or pasted over with a paper parcel. Boxes with sets of colored pencils were pasted over with multi-color labels, usually with art reproductions.

Pencils "Cosmetics" (Slavic State Pencil Factory MMP Ukrainian SSR)

Graphite pencils "Painting", "Youth", "Colored"

Set of colored pencils "Youth" - art. 139 out of 6 pencils. The price is 77 kopecks.

Set of colored pencils "Color" - art. 127 and 128 from 6 and 12 pencils. The price of one pencil is 8 kopecks and 17 kopecks, respectively.

Set of colored pencils "Painting" - art. 135 out of 18 pencils. The price is 80 kopecks.

Colored graphite pencils "Painting", "Art"

Set of colored pencils "Painting" - art. 133 out of 6 pencils. The price is 23 kopecks.

Set of colored pencils "Art" - art. 113 out of 18 pencils. The price is 69 kopecks.

Set of colored pencils "Art" - art. 116 out of 24 pencils. The price is 1 ruble 20 kopecks.

Practical tasks in engineering graphics

Drawing lines and fonts

Graphic Work No. 1

Graphic work № 1 , recommended for students to perform engineering graphics, aims to master the skills of drawing drawing lines, fonts and inscriptions, as well as to get acquainted with the basics of working with a compass.
In the process of doing the work, the student must complete the frame of the drawing, the main lines provided ESKD, drawing font letters, and circles represented by various drawing lines.

The work is done on drawing paper A3 (420×297 mm).
To complete the work, you will need pencils with hardness TM ,T , 2T , a ruler with a length of at least 300 mm, a protractor, a compass, a square (for making auxiliary parallel lines), eraser, pencil sharpener.
Ruler and square must be wooden or plastic (metal ones strongly “cut” the pencil lead, leaving dirt on the drawing).

For high-quality graphic work, it is necessary to have a set of pencils, which must necessarily include a pencil of medium hardness ( TM ), solid ( T ) and very hard ( 2T ). In this case, hard pencils are used to draw thin lines on the drawing and for a preliminary outline of the outline of the image, which is subsequently outlined with a medium-hard pencil.
The marking of pencils adopted in different countries is described below.

Designation of pencil hardness

In different countries, the hardness of pencils is marked with different symbols.
In Russia, the marking of pencils with letters has been adoptedM (soft) andT (solid) or combinations of these letters with numbers and with each other. The numbers in front of the letter are an indication of the degree of hardness or softness of the pencil. At the same time, it is intuitively clear that2M - very softM - soft pencil,TM - a pencil of medium hardness (hard-soft),T - hard and2T - a very hard pencil.

There are often imported pencils on sale, for which European or American markings are used.
In the USA, pencils are marked with numbers from 1 to 9 (fractional numbers are also used, for example: 2.5), while the number is usually preceded by a # (pound sign):#1 , #2 , #2,5 , #3 , #4 etc. The larger the number (number) in the marking, the harder the pencil.

The European marking of pencils is based on the letters of the Latin alphabet:

· B (short for blackness - blackness) - corresponds to the Russian marking under the letterM (soft);

· H (from hardness - hardness) - corresponds to the Russian hardness markingT (solid);

· F (from fine point - subtlety, tenderness) - a pencil of medium hardness, approximately corresponds toTM . However, the combination of lettersH andAT – HB also indicate the average hardness of the pencil.

European marking provides for a combination of lettersAT andH with numbers (from 2 to 9), while, as in Russian marking, the larger the number, the higher the property of the pencil corresponding to the letter (softness or hardness). Pencils of medium hardness according to the European marking have the designationH , F , HB orAT .
If there is a letter on the pencilAT with a number from 2 to 9 (for example:4V , 9V etc.), then you are dealing with a soft or very soft pencil.
LetterH with a number from 2 to 9 on a pencil indicates its increased hardness (for example,2H , 7H etc.).

Graphic work task №1 and a sample of the work performed are shown in the figure below.
A full-size sample of the work can be opened in a separate browser window by clicking on the picture with the mouse. After that, it can be downloaded to a computer or printed on a printer for use as a task for students.
The task is presented in two versions:

· Option number 1

· Option number 2

The task is aimed at acquiring and improving the skills of drawing lines of a drawing and fonts, while their style must comply with the requirements stipulated by the standards ESKD and ESTD.

As required ESKD the dimensions of lines and fonts in the drawing must meet the following requirements:

· main solid thick line (for drawing a frame, title block, outline of a part or assembly - that is, the main lines of graphic work) should be thick 0.6...0.8 mm; on large drawings, this line can reach 1.5mm in thickness.

· dashed line (draw lines of an invisible contour)- made thick 0.3 ... 0.4 mm (i.e. twice as thin as the main thick line). Stroke length (4-6mm) and the distance between adjacent strokes (1-1.5mm) normalized GOST 2.303-68;

other lines (dash-dotted, wavy, solid fine - to designate axes, extension and dimension lines, section boundaries, etc.)- thick 0.2 mm (i.e. three times thinner than the main thick solid line).
The length of the strokes in the dash-dotted line (designation of axes) should be 15-20 mm, the distance between adjacent strokes - 3 mm.

· letter height fonts must correspond to the ruler allowed by the standard, while the height of lowercase letters and the distance between letters in a line correspond to the size of uppercase (capital) letters.
Most often in graphic works of the format A4 and A3 fonts like AT with tilt angle 75 degrees, while the height of lowercase letters (which should be equal to 7/10 of the height of uppercase i.e. capital letters), is taken equal to 3.5 or 5 mm (respectively, the height of capital letters is 5 or 7 mm).

· Letter spacing line should be equal to 1/5 capital height (capital) letters, i.e. for capital letter height 5 mm spacing between letters in a string - 1 mm, for capital letter height 7 mm- spacing between letters 1.5mm .
When writing letters, it is important to keep them the same height and slope in the line, as well as the distance between adjacent letters.