| 摘要 |
PROBLEM TO BE SOLVED: To provide a diazo copying material which is impasted in binding after copying without turning an impasted part red even when acid-free paper containing calcium carbonate, kaolin, talc, titanium dioxide or the like is used as a support for the diazo copying material. SOLUTION: The diazo copying material is obtained by disposing a photosensitive layer containing mainly a diazo compound and a coupling component on a support comprising acid-free paper whose surface pH is≥5.5 by way of a precoat layer and further disposing a back layer on the side of the support opposite to the photosensitive layer, wherein the back layer contains benzotriazole or its derivative. COPYRIGHT: (C)2003,JPO
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