Ink pencils. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Ink pencils. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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So called chemical ink pencils are prepared from a mixture of graphite, clay, aniline paints and binders. Usually pencils are prepared in purple, so methyl violet aniline dye is used. The binder is clay, gum arabic, shellac, etc.

Depending on the amount of binder, pencils of different hardness are obtained. So, to get soft pencils, take 4 wt. hours of graphite, 1,5 wt. including kaolin and 5 wt. hours of coloring matter. For medium hardness - 3 wt. hours of graphite, 2-4 wt. including kaolin and 3 wt. hours of paint. For hard - 2,5 wt. hours of graphite, 5 wt. including kaolin and 2,5 wt. hours of paint.

All substances are finely ground, moistened with small amounts of water until a thick dough is formed, which is molded in the form of sticks. After drying, they are sent to the tree.

According to the following method, a Bakelite solution is used as a binder. The mass production method is as follows.

An alkaline solution of the initial condensation product of formaldehyde with phenols is mixed with finely worn graphite, filling and coloring substances of the pencil mass, the mixture is heated and molded in the usual way. In the case of using dyes that cannot withstand contact with alkalis (for example, rosaniline, crystal violet, etc.), the bakelite compound is dissolved in alcohol.

Two recipes:

For blue pencil

Graphite 25 g;
Talc, clay and other 20 g;
Soot 5 g;
Bakelite 1% alkaline solution 30 g;
20% diamine blue dye solution XNUMX g.

For purple aniline pencil

Graphite and other filling substances 50 g;
1% -5% alcohol solution of bakelite 20-40 g;
Alcoholic solution of methyl violet (from 1 to 3%) 10-20 g.

Author: Korolev V.A.

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