Dust-free chalk

Abstract

The invention discloses a dust-free chalk. The dust-free chalk comprises the following raw materials: 40-50 parts of gypsum powder, 20-24 parts of titanium dioxide, 10-20 parts of superfine calcium carbonate, 20-30 parts of paroline, 2-4 parts of anhydrous sodium sulphate, 2-4 parts of zinc oxide and 50-60 parts of water. The dust-free chalk has no flying dust in writing and wiping processes, writes smoothly and clearly, does not slip, is not sticky and can meet needs of people.

Description

technical field [0001] The invention relates to a chalk, in particular to a dust-free chalk. Background technique [0002] When traditional chalk is written and wiped, dust will fly, which will affect the human body, and the writing is easy to slip and not fluent. The function of chalk needs to be enriched. SUMMARY OF THE INVENTION [0003] Purpose of the invention: The purpose of the present invention is to provide a dust-free chalk in order to solve the deficiencies of the prior art. [0004] Technical scheme: In order to achieve the above purpose, the present invention provides a dust-free chalk, the dust-free chalk is composed of the following raw materials: 40-50 parts of gypsum powder, 20-24 parts of titanium dioxide, ultrafine calcium carbonate 10-20 parts, paraffin oil 20-30 parts, Yuanming powder 2-4 parts, zinc oxide 2-4 parts, water 50-60 parts. [0005] Beneficial effects: the dust-free chalk of the present invention is free from dust and flying when writing ...

AI Technical Summary

Problems solved by technology

[0002] When traditional chalk is written and wiped, dust will fly, which will affect the human body, and the writing is easy to slip and not fluent. The function of chalk needs to be enriched