Pearl whitening treatment technique

Abstract

The invention relates to a whitening treatment process used for pearls. Pearls whitened in hydrogen peroxide solution are immersed in an organic solution A for a pre-treatment and then vacuumizing is carried out. Then the pearls are immersed under pressure in a fluorescence whitening liquid 1 formed by an organic solution B in which a bluing fluorescence whitening agent 1 is dissolved by 12 to 48hours under a temperature from 20 to 60 DEG C, then the pearls are cleaned and dried, then the vacuumizing is carried out again. Then the pearls are immersed under pressure in a fluorescence whitening liquid 2 formed by an organic solution C in which a reddening fluorescence whitening agent 2 is dissolved by 12 to 48 hours under a temperature from 20 to 60 DEG C, and then the pearls are cleaned and dried, then the process is finished. The whiteness of the pearl treated by the process can be greatly enhanced, and redness can be seen through the whiteness, and the brightness is brilliant and the value of the pearl can be greatly enhanced.

Description

A whitening treatment process for pearls (1) Technical field The invention relates to a pearl whitening treatment process. (2) Background technology Bleached white pearls generally have a slight absorption of blue light (450-480nm) in visible light (wavelength range 400-800nm), resulting in insufficient blue, making it slightly yellow or cyan, thus affecting the whiteness. People feel old and unclean. Most consumers in the market prefer white, and white slightly rose red is the best. Therefore, some pearls that are not completely bleached need to be whitened. At present, there are two methods commonly used in pearl whitening treatment: one is garland whitening, that is, adding a small amount of blue pigments such as methylene chloride chloride to pre-whitened items, and covering the substrate by increasing the reflection of blue light. Slight yellow to make it look whiter, although Garland can whiten, but firstly the effect is limited, secondly due to the decrease of th...

AI Technical Summary

Problems solved by technology

At present, there are two methods commonly used in pearl whitening treatment: one is garland whitening, that is, adding a small amount of blue pigments such as methylene chloride chloride to pre-whitened items, and covering the substrate by increasing the reflection of blue light. Slight yellow to make it look whiter, although Garland can whiten, but firstly the effect is limited, secondly due to the decrease of the total amount of reflected light, the brightness is reduced and the pearl color becomes darker; the other is to use a certain kind of fluorescent light The whitening agent is made into a solution for soaking treatment, but there is no whitening agent specially developed for pearls at present, and various types of fluorescent whitening agents and different process conditions make their application effects on pearls vary. hard to make a noticeable effect