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US4250244A Thiacyanine betaine blue sensitizing dyes 失效
Thiacyanine甜菜碱蓝增感染料

Thiacyanine betaine blue sensitizing dyes
摘要:
Photosensitivity of a blue-sensitive emulsion in a multi-color diffusion transfer photographic system is enhanced by sensitizing the emulsion with certain 3,3'-disubstituted 4,5-benzothia-thiacyanine betaines.
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