印第安人过去常用颜料在脸上涂条纹。
试验和研究了塑料着色用常用颜料偶氮类，酞菁类及无机颜料对PE着色后的辐照特性。
The color characteristics of colored PE in different radiation dosages, which is colored with azos, phthalocyanines, inorganic pigments respectively, has been studied in this paper.
其中固相反应法生产工艺简单，是目前工业生产常用方法，但制备的颜料粒径、色泽、稳定性等性能不能充分满足市场需求；
The solid phase reaction process is commonly used in industry because of its simple technology, but the particle size, color, stability of pigment can not fully meet the market demand.
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