Pearl bleaching process

A pearl and craft technology, applied in the direction of jewelry, clothing, application, etc., can solve the problems of spots on the surface of the bead, decrease in the strength of the pearl bead, affect the quality of pearl processing, etc., and achieve good bleaching effect, good luster, and little damage. Effect

Inactive Publication Date: 2009-12-09
浙江梵沛珍珠股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the bleaching time is too long, resulting in a decrease in the strength of the pearl body, which can make the pearl body brittle and even loose, and spots and peeling appear on the surface of the pearl body, which affects the processing quality of the pearl.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) The mass concentration of 15g sodium hydroxide, 5g sodium silicate and 1000ml is 1% ammonia water and is mixed with catalyst solution.

[0020] (2) Take 20g of polyethylene glycol p-toluenesulfonate, 10g of sodium lauryl sulfate, 8g of Tween 80 and 1000g of deionized water to prepare an interface agent solution.

[0021] (3) Prepare bleaching solution. The mass concentration that gets 1000g is the methyl alcohol of 99.99%, the catalyst solution that 10g is made by step (1), the interfacial agent solution that 20g is made by step (2), the mass concentration of 35g is that the hydrogen peroxide solution of 30% mixes preparation into bleach.

[0022] (4) Under sufficient light, put the pearls treated with brightening into the bleaching solution and soak for 48 hours for bleaching, the working temperature is 14°C; after washing with water, dry naturally for 24 hours.

[0023] (5) Repeat step (4) four times. Then classify and screen out non-conforming products.

[00...

Embodiment 2

[0026] (1) The mass concentration of 15g sodium hydroxide, 5g sodium silicate and 1000ml is 1% ammonia water and is mixed with catalyst solution.

[0027] (2) Take 20g of polyethylene glycol p-toluenesulfonate, 30g of sodium lauryl sulfate and 1000g of deionized water to prepare an interface agent solution.

[0028] (3) Prepare bleaching solution. The mass concentration that gets 1000g is the methyl alcohol of 99.99%, the catalyst solution that 10g is made by step (1), the interfacial agent solution that 20g is made by step (2), the mass concentration of 15g is that the hydrogen peroxide solution of 30% mixes preparation into bleach.

[0029] (4) Under sufficient light, put the pearls treated with brightening into the bleaching solution and soak for 50 hours for bleaching, the working temperature is 17°C; after washing with water, dry naturally for 24 hours.

[0030] (5) Repeat step (4) four times. Then classify and screen out non-conforming products.

[0031] (6) Repeat s...

Embodiment 3

[0033] (1) The mass concentration of 15g sodium hydroxide, 5g sodium silicate and 1000ml is 1% ammonia water and is mixed with catalyst solution.

[0034] (2) Take 20g of polyethylene glycol p-toluenesulfonate, 35g of sodium lauryl sulfate and 1000g of deionized water to prepare an interface agent solution.

[0035] (3) Prepare bleaching solution. The mass concentration that gets 1000g is the methyl alcohol of 99.99%, the catalyst solution that 10g is made by step (1), the interfacial agent solution that 20g is made by step (2), the mass concentration of 20g is that the hydrogen peroxide solution of 50% mixes preparation into bleach.

[0036] (4) Under sufficient light, put the pearls treated with brightening into the bleaching solution and soak for 48 hours for bleaching, the working temperature is 17°C; after washing with water, dry naturally for 24 hours.

[0037] (5) Repeat step (4) four times. Then classify and screen out non-conforming products.

[0038] (6) Repeat s...

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PUM

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Abstract

The invention discloses a pearl bleaching technology, which comprises the following steps that: in the sufficient sunshine, pearls after being polished are put into prepared bleaching liquid and soaked at the temperature ranging from 14 to 17 DEG C for 48 to 50 hours for bleaching treatment, and then rinsed and dried; the step is repeated for at least one time; classification: unqualified pearls are screened out and the bleaching treatment for unqualified pearls continues to be repeated for at least one time. In the invention, the format of the bleaching liquid, consisting of a hydrogen peroxide bleaching agent, a composite interface agent, a composite catalyst and a methanol solvent, is adopted for bleaching at the low temperature of 14 to 17 DEG C so as to realize the good bleaching effect under low concentrations of the hydrogen peroxide bleaching agent within a short time, thus effectively reducing the damage to the skin of the pearl and improving the glossiness of the pearl. By adopting the method of the invention, the pearls bleached have better gloss, smooth surface, higher whiteness and good stability.

Description

technical field [0001] The invention relates to a pearl processing technique, in particular to a pearl bleaching technique. Background technique [0002] Pearls are crystal clear, exquisite and elegant, bright and dazzling, and have extremely high decorative value. However, due to the influence of various factors during the formation process of pearls, the appearance quality varies greatly, and some pearls need to be optimized and processed before they can be made into handicrafts. Bleaching is the most important pearl optimization treatment method, which can remove foreign impurities in pearls, improve color and luster, and increase decorative value. Therefore, in addition to pearl cultivation technology, the level of pearl bleaching technology also directly affects the quality of pearl products. [0003] The main factors affecting the bleaching effect are: the composition of the bleaching solution formula and the bleaching process conditions. The bleaching solution is m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A44C27/00
Inventor 戚鸟定
Owner 浙江梵沛珍珠股份有限公司
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