Bleach, Golden Dye And Identification Of Pearls

On the basis of traditional bleaching processes, add bleaching auxiliary and have new bleach test:in bleaching process, stir-in focal sodium hope can increase the whiteness of bleached freshwater cultured pearls;stir-in magnesium sulfate hope to improve the utilization efficiency of hydrogen peroxide. After repeated experiments and bleaching process improvement and get expected effect. Use active yellow M-3RE, sunset yellow 85 and active yellow K-4G on golden dyeing experiments of pearls. After several test cycle of trial and follow-up tests in dyeing process, by comparison, draw dyeing effect good dye, that active yellow K-4G can good attach to pearls and achieve good dyeing effect. Using the laser raman spectrometer, UV-Vis infrared spectrophotometer and fluorescence spectrometer, for golden pearls, market golden dyeing pearls and golden dyeing pearls of author, take a series of tests and analysis. The above samples in the instrument testing all have their own equipment testing features, and organic dyes lead to difference basically.