A kind of colored pencil core and preparation method thereof

A pencil lead and color technology, applied in pencil lead, household utensils, application and other directions, can solve the problems of complex raw materials and process for color pencil lead production, handwriting cannot be automatically faded, and user's health is unfavorable, etc., to improve hardness and coverage. , smooth writing, bright color effect
CN103073957BInactive Publication Date: 2014-10-22浙江奥乐奥新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
浙江奥乐奥新材料科技有限公司
Publication Date
2014-10-22
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention provides a colored pencil lead and a preparation method thereof. The colored pencil lead comprises components in parts by mass as follows: 62-73 parts of sodium thiosulfate, 13-20 parts of a color developing agent, 7-15 parts of CMC (carboxy methylated cellulose) and 0-8 parts of kaolin, wherein the color developing agent consists of sodium carbonate and an acid-base indicator. The preparation method of the colored pencil lead includes steps of weighing the raw materials in proportion, mixing sodium carbonate and the acid-base indicator, adding absolute ethyl alcohol dropwise and mixing to a heavy paste, then pouring molten sodium thiosulfate in and stirring evenly, adding CMC and kaolin, stirring evenly, pouring into a die, drying, and taking out. The provided colored pencil lead can fade both when the lead meets water and when the lead is placed in the air for a long time, is easy to wash when adhering to hands or clothes, is non-residual, non-toxic and harmless, and is suitable for occasions where long-stem storage is not needed, such as temporary marking, calligraphy and painting exercise, and the like.
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Description

technical field

[0001] The invention relates to a writing material, in particular to a colored pencil lead suitable for occasions such as temporary marking, calligraphy and painting practice, etc. that do not require long-term storage and a preparation method thereof. Background technique

[0002] In the prior art, the common pencil lead used for writing, drawing and painting is basically composed of clay and graphite powder, which has disadvantages such as incomplete erasing, unhygienic, and difficult to clean when it gets on hands, which is harmful to the health of users. Unfavorable; The raw material and process complexity of existing colored pencil lead are as patent CN1302316A, and raw material pollutes environment, and the handwriting of writing can not fade automatically, is not suitable for the occasion that does not need long-term preservation such as temporary marking, calligraphy and painting practice. Contents of the invention

[0003] The object of the present...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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