Decoloration ink

Abstract

The invention discloses decoloration ink which comprises the following components in percentage by weight: 86-93 percent of water, 2-8 percent of thyme phenolphthalein, 3-5 percent of sodium hydroxide and 1-5 percent of NaCl. In the invention, by utilizing the characteristic that the thyme phenolphthalein is blue in an alkaline environment with a pH value of 9-12, after the ink is sprayed on a clothing material or paper, water is absorbed by fibers to ensure that the pH value of the ink becomes smaller until reaching a neutral environment, and then the ink changes from blue to colorless so as to achieve the purpose of decoloration.

Description

technical field [0001] The invention relates to an ink, in particular to an ink capable of automatically decolorizing under natural conditions. Background technique [0002] Most of the inks currently used are carbon inks. Once carbon inks are written on paper or objects, they will leave permanent marks and are difficult to remove. Sometimes people don't want the ink to stay on the paper or objects permanently, for example, when the clothes are cut, they need to draw lines on the fabric, and they don't want to leave ink lines after the clothes are finished. Contents of the invention [0003] The invention provides an ink that can disappear automatically under natural conditions. [0004] The technical solution of the present invention is: a kind of decolorizing ink, comprising the following components in mass percentage: water 86%-93%; thymolphthalein 2%-8%; sodium hydroxide 3%-5%; NaCl 1%-5% %. [0005] The present invention utilizes thymolphthalein to be blue in an al...

AI Technical Summary

Problems solved by technology

[0002] Most of the inks currently used are carbon inks. Once carbon inks are writte