A kind of rapid bleaching method and bleaching solution of pearl

Abstract

The invention discloses a pearl bleaching processing method, which is carried out according to the following technological process: first, the pearl is perforated, soaked and washed with a mixed solution of dilute sodium hydroxide and a surfactant, and then washed with clear water and dried; the pearl is placed in a pretreatment Soak in the bleach solution for 10 hours, take out the pearls after 10 hours, wash them with clean water, and a smooth dark brown dense layer is formed on the surface of the pearls; put the pearls into the bleach solution A, irradiate with ultraviolet light for 30 minutes, change the solution, and repeat the bleaching process for a total of 10 minutes. About 2 hours; take out the pearls and wash them, put them in the bleach solution B, irradiate them with ultraviolet light for 30 minutes, change the solution, and repeat the bleaching process for a total of about 4 hours. The pearls processed by the pearl bleaching process described in the present invention have a bleaching rate of up to 98% for light variegated pearls and more than 90% for darker pearls through repeated practical applications.

Description

technical field [0001] The invention relates to a pearl bleaching process and a bleaching solution corresponding to the corresponding process. The invention belongs to the technical field of bleaching pearls by chemical and physical technology. Background technique [0002] Pearl is the secretion of mantle cells of some shellfish in the double class of molluscs. It is a specific crystal structure formed by the alternating arrangement of thousands of layers of inorganic calcium carbonate crystal layers and thin layers of biomacromolecule keratin. Artificial cultured freshwater pearls are mostly round, oblate, oval and shaped. The colors are miscellaneous white series, red series, yellow series, black series and so on. Raw beads collected from farms need to undergo a series of processing procedures such as sorting, punching, bleaching, brightening, and stringing to become decorative ornaments with aesthetic value. Among them, bleaching is the most critical process in pearl ...

AI Technical Summary

Problems solved by technology

[0003] The existing bleaching processes mainly include dissolution decolorization, chemical decolorization, etc., but because of the unique physical and chemical properties and crystal structure of pearls, high density and hardness, specific optical surface, and the water environment and breeding cycle of artificially cultured pearls in my country are different. , which leads to a large difference in the numerical range of the above characteristics, which increases the difficulty of the pearl bleaching process, and the existing pearl bleaching cycle needs at least a week or more, resulting in the disadvantages of laborious bleaching process and high cost.