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A writing liquid, blue-black technology, applied in ink, household utensils, applications, etc., can solve the problems of easy deposition of long-term pigments, cumbersome production process, etc., and achieve the effects of protecting eyesight, convenient use, and improving stability
Inactive Publication Date: 2009-08-12
山西奇色环保科技股份有限公司
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Summary
Abstract
Description
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Problems solved by technology
The writing liquid has the advantages of using water as a solvent and being dust-free, but its production process is cumbersome, and the pigment is easy to deposit after a long time
Method used
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Examples
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Effect test
Embodiment 1
[0019] α-Naphtholphthalein 4.00g
[0020] Phenolphthalein 0.16g
[0021] Sodium hydroxide 1.20g
[0022] Ethanol 9.46g
[0023] Formaldehyde 0.16g
[0024] Hydroxyethylcellulose 0.03g
[0025] Sodium dodecylbenzenesulfonate 0.02g
[0026] Distilled water 63.3g
Embodiment 2
[0028] α-Naphtholphthalein 5.20g
[0029] Phenolphthalein 0.22g
[0030] Sodium hydroxide 1.60g
[0031] Ethanol 7.90g
[0032] Formaldehyde 0.10g
[0033] Carboxymethylcellulose 0.06g
[0034] Sodium lauryl sulfate 0.05g
[0035] Distilled water 58.10g
[0036] Flavor 0.05g
Embodiment 3
[0038] α-Naphtholphthalein 4.19g
[0039] Phenolphthalein 0.15g
[0040] Sodium hydroxide 1.31g
[0041] Ethanol 10.38g
[0042] Formaldehyde 0.12g
[0043] Hydroxyethylcellulose 0.03g
[0044] Sodium dodecyl sulfonate 0.03g
[0045] Distilled water 66.23g
[0046] The writing liquid prepared in embodiment 1, 2 or 3 is non-toxic, non-irritating, harmless to the human body, and has no pollution to the environment. The handwriting can be erased with an aqueous solution (the effect of a weakly acidic aqueous solution is better), and the preparation method is simple and easy to use.
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PUM
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Abstract
The invention provides an erasable bluish dark writing liquid. The writing liquid mainly comprises the following components: alpha-naphtholphthalein, phenolphthalein, sodium hydroxide, ethanol, formaldehyde, a thickener, a surfactant and distilled water. The writing liquid is prepared by a complementary color principle, and has no toxicity, no penetrating odor and no corrosion. The writing liquid can not only be applied to a teaching board but also be applied to water-color brushes for children. The preparation process is simple and the writing liquid has convenient use. The writing liquid can be erased by water solution, and is a writing liquid without environmental pollution and harm to human bodies.
Description
technical field [0001] The invention relates to an erasable writing fluid, in particular to an erasable blue-black writing fluid. Background technique [0002] At present, people have invented various whiteboard writing fluids, inject them into special writing pens, and write on special whiteboards. They can replace chalk for teaching, and have the advantages of smooth writing, easy to erase, dust-free and environmentally friendly. Yet this writing fluid of research and development at present is mainly red, yellow, blue, green, purple etc., rarely see bibliographical information so far as commonly used black writing fluid. [0003] Chinese patent application No. 200710139431.6 discloses a "black writing liquid for light-colored teaching boards and its preparation method". Liquid, D liquid, surfactant, glycerin, hydrogen peroxide, glucose. Among them, liquid A contains formaldehyde and concentrated sulfuric acid, and liquid D contains solid iodine and concentrated sulfuric ...
Claims
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Application Information
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