发明授权
US4729935A Process for the production of photographic images utilizing a negative working diazo contact film 失效
使用负性重氮接触膜制作摄影图像的方法

Process for the production of photographic images utilizing a negative
working diazo contact film
摘要:
A process for the production of photographic images utilizing a photographic element comprising a transparent support and a coating on the support comprising a diazonium composition having a light absorbency of about 45% or less, and a colorant composition, said coating having a light transmission of not more than about 0.1%.
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