The present invention provides a photographic material comprising on a support photosensitive silver halide particles, and substantially light insensitive silver salt particles having a speed at least a factor 10 less under the same conditions of exposure and development of said photosensitive silver halide particles than said photosensitive silver halide particles and a releasing compound of formula (I) or (II) as specified in the claims capable of image-wise releasing sulphide or a sulphide under conditions for image-wise development of said photosensitive silver halide particles to silver. The present invention further provides a method for obtaining an image and a lithographic printing plate with said photographic material.
本发明提供了一种感光材料,该感光材料包含在支撑体上的感光卤化
银颗粒和基本上不感光的
银盐颗粒,在相同的曝光和显影条件下,所述感光卤化
银颗粒的显影速度比所述感光卤化
银颗粒的显影速度至少小10倍,以及权利要求中所述的式(I)或(II)的释放化合物,该化合物能够在所述感光卤化
银颗粒显影成
银的条件下从图像上释放
硫化物或一种
硫化物。本发明还提供了一种用上述感光材料获得图像和平版印刷板的方法。