Pearl bleaching solution and preparation method thereof

A technology for bleaching liquid and pearls, applied in the field of bleaching liquid, can solve the problems of roughness, pearl corrosion, loss of luster on the surface of pearls, etc., and achieve the effects of low pitting rate, good brightness and uniform color.

Inactive Publication Date: 2012-11-14
JIANGSU XINSHI PRECISION CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pH value of untreated hydrogen peroxide bleach is 3-4. If it is used directly for bleaching, it will corrode the pearl. The existing bleaching solution is to neutralize the hydrogen peroxide with alkali, but the alkali-neutralized bleaching solution is used in pearl bleaching. Or the pH is unstable during the placement process. If it is not handled properly, the surface of the pearl will lose its luster or become rough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 70 ml of hydrogen peroxide, 360 ml of methanol, 0.1 g of stabilizer RP, 3 g of compound emulsifier, and 400 ml of distilled water into a beaker, and stir slowly to make a clear solution; mix 2 g of sodium bicarbonate with an appropriate amount of water After dissolving, slowly add it to the above solution under stirring, and make the pH value of the bleaching solution 7 to obtain the pearl bleaching solution.

Embodiment 2

[0022] Put 150ml of hydrogen peroxide, 400ml of methanol, 0.3g of stabilizer, 5g of compound emulsifier, distill 500ml into a beaker, stir slowly to make a clear solution; dissolve 2.5g of sodium bicarbonate in an appropriate amount of water , slowly added to the above solution under stirring, so that the pH value of the bleaching solution is 7.2 to obtain pearl bleaching solution.

Embodiment 3

[0024] Put 200 ml of hydrogen peroxide, 480 ml of methanol, 0.5 g of stabilizer, 10 g of compound emulsifier, and 550 ml of distilled water into a beaker, and stir slowly to make a clear solution; dissolve 3 g of sodium bicarbonate in an appropriate amount of water , Slowly added to the above solution under stirring, so that the pH of the bleaching solution was 7.4 to obtain pearl bleaching solution.

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Abstract

The invention discloses pearl bleaching solution and a preparation method thereof. The pearl bleaching solution is composed of the components by mass: 70-200 parts of hydrogen peroxide, 2-3 parts of neutralizer, 360-480 parts of solvent, 0.1-0.5 parts of stabilizer, 3-10 parts of composite emulsifier and 400-550 parts of distilled water. The pearl bleaching solution prepared by the preparation method is mainly used for bleaching cultured pearl; and the bleached pearl is low in pitting rate, uniform in color and luster and good in brightness.

Description

technical field [0001] The invention relates to a bleaching solution, in particular to a pearl bleaching solution and a preparation method thereof. Background technique [0002] Due to the water quality and various conditions of cultured pearls, pearls collected from shells often have uneven colors. More than 90% of the raw pearls produced by farms cannot be directly used as jewelry or decorations, and must be processed. The processing of pearls is mainly bleaching, and the bleaching agent is hydrogen peroxide. The pH value of untreated hydrogen peroxide bleaching agent is 3-4. If it is used directly for bleaching, it will corrode the pearl. The existing bleaching solution is to neutralize the hydrogen peroxide with alkali, but the bleaching solution neutralized by alkali is used in pearl bleaching. Or the pH is unstable during the placement process. If it is not handled properly, the surface of the pearl will lose its luster or become rough. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A44C27/00
Inventor 干文中
Owner JIANGSU XINSHI PRECISION CHEM
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