发明授权
US4610924A Support of photographic paper 失效
支持相纸

Support of photographic paper
摘要:
A support of photographic paper one of whose surfaces is provided with a writing-retainable layer capable of retaining penciled characters, marks, ink, etc. The writing-retainable layer comprises crystalline silica having a number-average particle size of 0.1-3.0 .mu.m and a film-forming organic polymer.
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