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松香是一种硬脆透明、折断面成贝壳状有光泽的固体树脂。由于原料品质、加工方法、贮存运输条件的差异,松香颜色可由淡黄变至综红。松香难溶于水而易溶于多种有机溶剂,如酒精、苯、乙醚等。利用松香及其溶液对光线的透过、吸收特性,可以进行颜色的测定。国内外松香方面的专家对松香颜色的测定方法进行了大量的研究与改进。根据测定时松香的状态,可分为松香溶液颜色测试法和固体松香颜色测试法两类。
Rosin is a hard and brittle transparent, broken off into a shell-like shiny solid resin. Due to the quality of raw materials, processing methods, storage and transportation of different conditions, rosin color change from light yellow to red. Rosin insoluble in water and soluble in a variety of organic solvents, such as alcohol, benzene, ether and so on. The use of rosin and its solution of light through the absorption characteristics of the color can be measured. Rosin experts at home and abroad on the method of determination of rosin color a lot of research and improvement. According to the determination of the rosin state, can be divided into rosin solution color test and solid rosin color test two categories.