申请人:Fuji Photo Film Co., Ltd.
公开号:US04377634A1
公开(公告)日:1983-03-22
A method for forming a high contrast negative photographic image, which comprises imagewise exposing a photographic material comprising a support having thereon at least one photographic silver halide emulsion layer with the photographic silver halide emulsion layer or at least one hydrophilic colloid layer of the photographic material containing a compound of the general formula (I) R.sup.1 --NHNHCO--R.sup.2 (I) wherein R.sup.1 represents an aryl group, and R.sup.2 represents a hydrogen atom, a phenyl group, or an unsubstituted alkyl group containing 1 to 3 carbon atoms, and then developing the imagewise exposed material in the presence of a hydroquinone compound of the general formula (II) ##STR1## wherein R.sup.3, R.sup.4, R.sup.5 and R.sup.6, which may be the same or different, each represents a hydrogen atom, a sulfo group, an alkyl group, an aryl group, an aralkyl group, a heterocyclic group, or a group of the formula --O--R.sup.7 or --S--R.sup.7 where R.sup.7 represents an alkyl group, an aryl group, an aralkyl group, or a heterocyclic group with at least one of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 representing a group other than a hydrogen atom or a sulfo group.
一种制备高对比度负片照片图像的方法,包括将一种包含至少一个银卤化物乳剂层的支撑体的照相材料,通过图像曝光使得银卤化物乳剂层或照相材料的至少一个亲水性胶体层含有化合物(I)的方法,其中化合物(I)的一般式为R.sup.1 --NHNHCO--R.sup.2 (I),其中R.sup.1表示芳基,R.sup.2表示氢原子,苯基或含有1至3个碳原子的未取代烷基,然后在存在一种羟基苯醌化合物的情况下,对图像曝光的材料进行显影,该羟基苯醌化合物的一般式为(II) ##STR1## 其中R.sup.3、R.sup.4、R.sup.5和R.sup.6可以相同也可以不同,分别表示氢原子、磺酰基、烷基、芳基、芳基烷基、杂环基或式--O--R.sup.7或--S--R.sup.7的基团,其中R.sup.7表示烷基、芳基、芳基烷基或杂环基,其中至少有一个R.sup.3、R.sup.4、R.sup.5和R.sup.6表示除氢原子或磺酰基外的基团。