Black writing liquid used for light-color teaching board and preparation method thereof

A technology for writing liquid and teaching board, applied in the field of black writing liquid and its preparation, can solve the problems of high cost and complicated production process, and achieve the effects of low price, simple preparation process and easy-to-obtain raw materials

Inactive Publication Date: 2008-03-19
SHANGHAI WUZHIFENG INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its production process is cumbersome and costly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A recipe for black writing fluid that can be used on light-colored teaching boards:

[0040] Carboxymethyl starch 120g

[0041] Liquid A 100g

[0042] Liquid D 600g

[0043] Sulfoimidazoline Betaine 5g

[0044] Glycerin 10g

[0045] Hydrogen peroxide 120g

[0046] Glucose 45g

[0047] Distilled water 1000ml

[0048] Preparation of writing fluid:

[0049] (1) Preparation of liquid A: Measure 6ml of concentrated sulfuric acid and 3ml of formaldehyde with a graduated cylinder, add 100ml of water, stir evenly at room temperature, and set aside for later use;

[0050] (2) Preparation of liquid D: Weigh 50g of potassium iodide and 4g of iodine, put them into a 2500ml large beaker, first add a small amount of water and stir to dissolve, then add water to 500ml, then add 100ml of absolute ethanol, stir to dissolve evenly, place spare;

[0051] (3) Preparation of black blackboard liquid: weigh each component according to the above ratio, put the water-soluble starch into ...

Embodiment 2

[0053] A recipe for black writing fluid that can be used on light-colored teaching boards:

[0054] Hydroxyethyl starch 80g

[0055] Liquid A 150g

[0056] Liquid D 800g

[0057] N-Laurylalanine 3g

[0058] Glycerin 5g

[0059] Hydrogen peroxide 82g

[0060] Glucose 80g

[0061] Distilled water 800ml

[0062] (1) Preparation of liquid A: Use a graduated cylinder to measure 10ml of concentrated sulfuric acid, 60ml of formaldehyde, add 800ml of water, stir evenly at room temperature, and set aside for later use; (2) Preparation of liquid D: Weigh 40g of potassium iodide and 32g of iodine, and put them into 2500ml In a large beaker, first add a small amount of water and stir it to dissolve, then add water to 1600ml, then add dehydrated alcohol 500ml, stir and dissolve, and place for subsequent use; (3) preparation of black writing solution: same as embodiment 1.

Embodiment 3

[0064] A recipe for black writing fluid that can be used on light-colored teaching boards:

[0065] Hydroxypropyl starch 150g

[0066] Liquid A 400g

[0067] Liquid D 500g

[0068] Lauryl hydroxyethyl hydroxypropyl imidazoline sulfonate 20g

[0069] Glycerin 20g

[0070] Hydrogen peroxide 150g

[0071] Glucose 30g

[0072] Distilled water 730ml

[0073] (1) Preparation of liquid A: Use a graduated cylinder to measure 6ml of concentrated sulfuric acid, 18ml of formaldehyde, add 480ml of water, stir evenly at room temperature, and set aside for later use; (2) Preparation of liquid D: Weigh 52g of potassium iodide and 16g of iodine, and put them into 2500ml In a large beaker, first add a small amount of water and stir to make it dissolve, then add water to 1600ml, then add 400ml of absolute ethanol, stir and dissolve evenly, and place it for later use; (3) Preparation of black ink: same as in Example 1.

[0074] The inks prepared in Examples 1, 2, and 3 will not produce pr...

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PUM

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Abstract

The invention provides a black writing liquid for light-colored teaching board, which is based on the color principle of starch and iodine, using water-soluble starch as main raw material, and using concentrated sulfuric acid, formaldehyde, potassium iodide, iodine, ethanol, glycerol, hydrogen peroxide, glucose, amphoteric surfactant and distilled water as assistant raw material. The writing liquid is harmless to human beings, and has no pollution to environment and can be microbial biodegradated. The writing liquid can be decolored by water scrubbing and does not contaminate hand and clothes, which is easy to wash without cooperating with special liniments. The invention has simple formulated technology, available raw materials and low price.

Description

technical field [0001] The invention relates to ink, in particular to a black writing liquid for light-colored teaching boards and a preparation method thereof. Background technique [0002] Chalk blackboard is a traditional teaching method, but chalk dust seriously pollutes the teaching environment and endangers the health of teachers and students. At present, there are many kinds of teaching board writing liquids on the market. It mainly uses pigments or dyes as colorants, injects the writing liquid into special writing pens, and writes on special boards. It can replace chalk for teaching. It has smooth writing and easy erasing. In addition, dust-free and other advantages. These writing fluids use pigments or dyes, and some use wet rubbing, which can chemically degrade and decolorize, but they must be equipped with special liniments; It is irritating to the skin and will cause certain harm to people and the environment; in addition, the use of colorants or special linime...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/16
Inventor 宋胜梅赵晓红郝利玲马广文李笃信林培华董川
Owner SHANGHAI WUZHIFENG INFORMATION TECH
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