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將海水天然珍珠、海水养殖珍珠和淡水養殖珍珠進行處理,使顏色更悅目,這在商業上是很有價值的。本文主要介紹人工處理珍珠的兩種基本方法及其鑒別。一種方法是化學方法,基本過程是將珍珠浸于稀硝酸銀溶液和稀氨水溶液,然後將它們暴露在光和硫化氫氣体中。這種方法能改變珍珠角質的顏色,使珍珠在反射光下變為黑色,而且顏色穩定,不受光和熱的影響。 這種染色方法可追溯到1915——1920年,其早先由法國人發明,故名為法国方法。當時他們對顏色不佳的天然珍珠進行處理然後和其它珍
Treating natural seawater pearls, sea cultured pearl and freshwater cultured pearl to make the color more pleasing is commercially valuable. This article mainly introduces two basic methods of manual processing of pearls and their identification. One method is a chemical method, the basic process is to dip the pearls in dilute silver nitrate solution and dilute ammonia solution, and then expose them to light and hydrogen sulfide gas. This method changes the color of the pearl keratin so that the pearl turns black in the reflected light and is stable in color and unaffected by light and heat. This staining method dates back to 1915-1920, originally invented by the French and hence the French method. At that time they dealt with the poor color of natural pearls and then and other Jane