| 摘要 |
PURPOSE:To improve the permeability of the title material by forming an outershell contg. formaldehyde and a specified melamine derivative-aldehyde resin around a core substance contg. silver halide and a polymerizable compd. CONSTITUTION:The outershell contg. the melamine derivative-aldehyde resin formed from the formaldehyde and the melamine compd. contg. 10wt.% of the melamine derivative shown by formula I, is formed around the core substance contg. the silver halide and the polymerizable compd. In formula I, R<1> and R<2> are each a kind of atom or group selected from a group comprising hydrogen atom and alkyl group, etc., X is -OR<5> group, etc., Y is an org. residual group having >=4 numbers of atoms connecting two triazine rings, (n) is an integer of 2-4. Thus, the photosensitive material has a thermosoftening property and the high permeability at the time of heating the material whereby the development time of the photosensitive material is reduced, and the image can be formed with good efficiency. |
