A photographic silver halide - printing paper and the use of the paper in the black - white - developing method

摘要

PURPOSE:To enhance the finished whiteness degree, and to quicken the treatment by providing a silver halide emulsion layer spectrally sensitized with cyanine pigment on a water-impermeable reflective substrate, and incorporating a water-insoluble fluorescent brightening agent into a hydrophilic vehicle coated on a substrate on the same surface. CONSTITUTION:A silver halide (AgX) emulsion layer coated and formed on a water-impermeable reflective substrate is spectrally sensitized with at least one of the cyanine pigments expressed by the formula I or II, and an emulsion or a latex wherein a water-insoluble fluorescent brightening agent is incorporated into at least one of the layers coated on a substrate on the same surface as the AgX emulsion layer. Such photographic printing paper is preferably used, for example, for black-and-white developing treatment and for rapid treatment for =30sec washing time by an automatic developing machine. Moreover, a remarkable effect on fixing treatment is realized by using an acid hardening fixer bath contg. polyvalent metals. And =87% whiteness degree can be obtained after developing treatment. Accordingly, rapid treatment is made possible without increasing the residual color of the fluorescent brightening agent, and the finish with high sensitivity and an excellent whiteness degree can be obtained.