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How are pencils classified?

How are pencils classified?

There are many kinds of pencils. Pencil specifications are usually represented by H and B. "H" is the beginning letter of English "Hard" (hard), which indicates the hardness of pencil lead. The larger the number in front of it, the harder the lead core is and the lighter the color is. "B" is the first letter of "Black" (black) in English, which represents the composition of graphite and indicates the soft quality of pencil lead and the obvious degree of writing. The larger the number in front of it, the thicker and darker the color.

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What are the characteristics of pencils?

What are the characteristics of pencils?

Pencil advantages: rich levels, can be in-depth, fine painting. Disadvantages: the picture is easy to reflective, easy to gray. The hardness mark of the pencil lead is generally "H" for hard pencils, "B" for soft pencils, "HB" for pencils with moderate hardness, and "F" for pencils with hardness between HB and H.

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Usage of water soluble color pencil

Usage of water soluble color pencil

Water-soluble colored pencils are also called watercolor pencils. However, it is difficult to draw the transparent texture of water like watercolor with water-soluble colored pencils. Therefore, it is most important to show the unique texture of water-soluble colored pencils as far as possible in painting, instead of replacing watercolor with water-soluble colored pencils.

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What are the classification of commonly used drawing pencils?

What are the classification of commonly used drawing pencils?

Pencil is a kind of pen used for writing and drawing sketch. It has a history of more than 400 years. Among them, pencil for painting is divided into many types: 2B pencil, charcoal pen, color pencil, etc. Let's see the difference today.

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Color pencil classification method

Color pencil classification method

Colored pencils are a very easy-to-master coloring tool, drawing effects and looks similar to pencils. The color is varied, the painting effect is lighter, fresh and simple, and most of them are easy to be erased. It is made of high-grade particulate pigments with high adsorption color development through professional selection. With transparency and color, it can be evenly colored when used on various types of paper, and the refill is not easy to fall off from the core slot. There are single series (129 colors), 12-color series, 24-color series, 36-color series, 48-color series, 72-color series, 96-color series, etc.

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Precautions for the use of pencils

Precautions for the use of pencils

The main components of the pencil refill are graphite and clay. Graphite is a flaky solid with metallic luster. Among them, there are carbon-carbon chemical bonds. Van der Waals force is between layers. The carbon-carbon chemical bonds are very stable. It is very difficult to destroy. This is why diamond and graphite are composed of carbon, but their physical properties and prices are very different, nothing in the human body can break the carbon-carbon chemical bond, so it is certain that pencil lead is safe (unless the clay inside is harmful to human health).

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Stages of development of the pencil

Stages of development of the pencil

First stage The birth of graphite: at this time, the "graphite pencil stick" is still in the original stage of only satisfying writing;

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Why can graphite do pencil lead?

Why can graphite do pencil lead?

First, it is black; second, it is soft and one of the softest minerals, graphite is one of the softest minerals of carbon, and its uses include making pencil leads and lubricants. Gently scratched on the paper, leaving a mark. If you look at it under a magnifying glass, the pencil is made up of very small graphite particles.

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