多层彩色电影胶片的严重缺点是彩色影象的保存性不够好,因为甲亚胺和靛苯胺类的染料稳定性差。染印法彩色影片的彩色由偶氮染料形成,其稳定性较好。目前印制染印法彩色影片所采用的空白片,其接收层中均加有媒染剂,以减少染印转移时染料的渗散。由于酸性染料的阴离子与媒染剂分子中的碱性基团互相 A serious disadvantage of multi-layer color film is that the preservation of the color image is not good enough because the dyes of azomethine and indanilide are poorly stable. Dyeing method Color film color formed by azo dyes, its stability is better. At present, the blank film used in the printing and dyeing method color film is added with the mordant in the receiving layer to reduce the dye diffusion when the dyeing is transferred. Since the anion of the acid dye interferes with the basic group in the molecule of the mordant