BLEACHING TECHNIQUE FOR THE PEARLS

Based on the intrinsic crystal structure and physical and chemical properties of pearl , a new technique for bleaching and brightening pearls by means of comprehensive mechanism of adsorptive and oxidative bleaching and fluoreseering was proposed in this paper .The technique can be used to bleach colored or faded pearls and make them glittering and lustering .The bleached pearls might keep their glittering for a long period of time .No scraps were scraped off from the pearl surface . This process is simple , efficient and practicable .The liquid agents for bleaching are formulated uniquely and scientifically .It is also applicable to shape-like pearls and shell-pitted pearls .