JPH07133457A - Chalk solution - Google Patents

Abstract

PURPOSE:To provide a chalk solution capable of writing characters by making the most of writing brush characteristics or drawing paintings by a paint brush directly on a blackboard, glass, wood, plastic, metal corrugated board, etc., being quick drying and capable of easily wiped out by a blackboard wiper, etc. CONSTITUTION:The solution is obtained by dissolving calcium carbonate or burnt gypsum powders in a highly volatile liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for writing characters and drawing pictures on blackboard, glass, wood, plastic, metal, corrugated board and others.

[0002]

2. Description of the Related Art Conventionally, when writing characters on a blackboard and drawing a picture, there is a black ink. Further, when writing characters on glass, plastic, metal, wood, cardboard, etc. to draw pictures, there are felt pens, paints, paints, and the like.

[0003]

Among the matters described in the prior art, the black ink is solid and has a problem that it is not possible to write characters with a brush or paintbrush and draw a picture or the like. It was

For felt pens, paints, paints, etc., it is possible to write characters on glass, plastic, metal, wood, cardboard, etc.
There is a problem that paints, etc. are not quick-drying, and felt pens, paints, paints, etc. cannot be easily erased.

The present invention has been made in view of the above problems of the prior art. The object of the present invention is to write a character on a blackboard with a writing brush, a paintbrush or the like to draw a painting or the like. In addition to being able to erase with a blackboard eraser as well as black ink, you can also write letters on glass, plastic, metal, wood, cardboard, etc. and draw pictures, etc. It seeks to provide something that is fast-drying and can be easily erased with a cloth soaked in water.

[0006]

In order to achieve the above object, the present invention comprises a liquid having high volatility and calcium carbonate or calcined gypsum powder, and the calcium carbonate or calcined gypsum powder is made into fine particles. However, they are mixed or dissolved to form a liquid.

The mixing or dissolving ratio depends on the respective purpose of how the mixed liquid of the present invention is used. In the case of thick and dark characters, paintings, etc., the proportion of highly volatile liquid is low, and it is in a muddy state where it does not mix or melt. Will be things.

When coloring is desired, a pigment or the like can be added.

[0009]

When a character is written and a painting is drawn by including the liquid of the present invention in a brush or a paintbrush, a liquid having a high volatility is written and drawn on the written and drawn object. Shortly after adhering to an object, it touches the air and evaporates and evaporates, and as a result, only calcium carbonate or plaster of Paris remains on the written and drawn object. Can be drawn.

[0010]

EXAMPLES Examples will be described. When 20 g of calcined gypsum powder was mixed with 20 cc of methyl alcohol, the liquid was included in a brush, and a character was written on the blackboard. The area around the character began to dry in about 1 second, and all the methyl was formed within 60 seconds. The alcohol evaporates and the written letters are completely dry,
Clear letters were written on the blackboard by the remaining plaster of Paris. Then, two minutes after writing the character, the character written using the blackboard eraser was erased, but it could be easily erased.

Next, 20 g of methyl alcohol was mixed with 30 g of calcined gypsum powder colored in blue with a pigment-based dye, the liquid was included in a writing brush, and characters were written on the glass, which was dried in about 20 seconds. It was in a state, and it was clearly visible in blue letters. Then, after writing the letter for 5 minutes, I wiped it with a wet rag, and the letter could be easily erased.

25 g of calcined gypsum powder was mixed with 20 cc of methyl alcohol, and the liquid was included in a writing brush. When a character was written on the plastic, it became dry in about 30 seconds and could be easily erased with a wet rag. .

Methyl alcohol (20 cc) was mixed with 10 g of calcium carbonate colored red by a pigment-based dye, the liquid was contained in a writing brush, and when writing characters on stainless steel, it became dry in about 10 seconds, resulting in a red color. The letters were clearly visible.

When 5 g of calcium carbonate was mixed with 20 cc of methyl alcohol and the liquid was included in a writing brush and a character was written on vinyl, it became dry in about 80 seconds and could be easily erased with a wet rag.

[0015]

Since the present invention is configured as described above, it has the following effects.

By using the writing brush containing the liquid according to the first aspect, it is possible to write characters on the blackboard directly by utilizing the characteristics of the writing brush. And since it is fast-drying and can be erased immediately with a blackboard eraser, it is very convenient when teaching calligraphy at schools.

With the liquid according to claim 1, it is possible to write characters on glass, plastic, metal, wood, cardboard, etc. to draw pictures, etc., and it has a quick-drying property, and those written and drawn are water. Since it can be easily erased with a cloth containing, it can be used in various ways such as in window displays.

It is conceivable that the liquid according to claim 1 is also used for drawing a line in a playground or the like. Normally used slaked lime is powder, so asphalt,
It does not completely adhere to soil and scatters during distribution and does not form a clear line, but if the liquid of claim 1 is used, it will dry immediately after drawing the line and even adhere to uneven surfaces such as asphalt and soil. By doing so, such problems can be solved.

Claims (1)

[Claims] 1. A liquid characterized in that calcium carbonate or calcined gypsum powder is mixed or dissolved in a liquid having high volatility.