Pearl color fading processing method

Abstract

The invention provides a pearl discoloration treatment method, comprising the following steps: performing steam bath on pearls using the mixture agent of organic solvent and water; soaking the pearls in absolute ethyl alcohol; treating the soaked pearls using hot air and finally bleaching the pearls. The discoloration treatment method uses the combination method of hot steam and hot air and the pearl color is mostly discolored after the two discoloration treatment methods with little damage on the pearl. The contrast analysis measurement shows that: the treated pearls have obviously increasedwhiteness, glitter and brightness compared with the pearls which are not treated and the treated pearls have increased whiteness, excellent brilliance, small pearls damage, compared with the pearls which are treated using the traditional technique; the pearl discoloration treatment method has largely reduced discoloration time compared with the traditional technique.

Description

(1) Technical field

[0001] The invention relates to a pearl fading treatment method. (2) Background technology

[0002] Pearl is an organic gemstone, which is composed of more than 92% calcium carbonate, about 4-6% shell keratin and a small amount of water, amino acids, trace elements and pigments. It is formed in the body of shellfish under accidental or artificial conditions, that is, when the external irritating small impurities enter the body and contact the mantle, the mantle is stimulated to secrete a kind of nacre, and these tiny A growth formed by wrapping layers of impurities. The formation of pearls will have different colors due to the influence of water quality, nutrition, trace elements and other factors. The color of pearls is generally composed of two parts: natural color and secondary color: the body color is also called body color or background color, which depends on the content of the pearl itself. Various pigments and color-causing elements, the most co...