Array of Changing Colors Hetian Yu ( Nephrite)
Standardized Samples
YUEYun-hui, LiZhong-zhi
Abstract: The distinguishing features of the color are the main criteria of certificating and classifying Hetian Yu ( Nephrite), however, so far there is not an adequate quantitative description for the features of the changes and distribution of color. The present paper aims at establishing a model of an array of regularly changing colors by accumulating and summarizing a large quantity of testing samples and personal experience .The description methods for the distinguishing features of the color by illustrating the digital colors are also discussed.
Keywords: Hetian Yu (Nephrite); standard samples;Array of regularly changing colors; Whiteness
根据目前实验室测试仪器的配备情况,我们选择了SBD-1B数字白度仪作为实物样品颜色分析的主要测试仪器,为符合该仪器测试窗口对样品的要求,玉石样品被加工为3.1 X 3.1 X 6.0 mm的方片形,这样就可以让加工人员在较小的原料上取到合适的样品,样品取样的纯度和代表性也得到了提高,同时也提高了采集样品的效率。加工好的样品采取双面精细抛光,抛光过程使用刚玉和人造金刚石的研磨抛光膏,避免了加工过程中的金属元素污染和颜色变化。