| 摘要 |
PROBLEM TO BE SOLVED: To obtain a heat-developable silver salt photosensitive material improved in blocking resistance by incorporating a matting agent narrow in grain diameter distribution in at least one of nonphotosensitive layers. SOLUTION: At least one of the nonphotosensitive layers contains the matting agent narrow in grain diameter distribution, and this agent means a monodispersed matting agent even in grain diameter, for example, the matting agent having the grain diameter distribution in which±10% of the average grain diameter includes >=80 volume % of the total grains, preferably, >=90 volume %. The nonphotosensitive layers contain at least 2 kinds of the matting agents different in the grain diameter distribution from each other, and such matting agents are obtained by mixing >=2 kinds of the ones different in the distribution. The average grain diameter of one of the agents is 2-10μm, preferably, 2.5-7μm, and that of the other is 0.3-1.3μm, preferably, 0.3-0.8μm.
|
