发明授权
US4094811A Process for the preparation of silver dispersions for filter layers and antihalation layers 失效
用于制备过滤层和防晕层的银分散体的方法

Process for the preparation of silver dispersions for filter layers and
antihalation layers
摘要:
The process for the preparation of silver dispersions for antihalation and filter layers in photographic material by reducing silver salts in the presence of a heterocyclic 5-membered or 6-membered compound which has a ##STR1## group in its 1,2,3-position and a 2-aminoalkyl or 2-hydroxyalkyl group or an alkylene chain which is linked through the 1- and 2-position. The process provides neutral grey silver dispersions without using cadmium salts, for the reduction of the silver salts.
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