A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of the formula (I)
1
wherein
X is O or NH;
n is 1 or 2,
p is 0, 1 or 2,
M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine;
each R
1
, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed;
each R
2
, independently, is hydrogen, C
1
-C
8
alkyl, C
1
-C
8
alkoxy, halogen, cyano, COOR, wherein
R is hydrogen or C
1
-C
3
alkyl, CONH—R in which R has its previous significance, SO
2
NH—R in which R has its previous significance, NH—COR in which R has its previous significance, or SO
3
M,
wherein
M has its previous significance, or, if
n is 1,
R
2
can also be CO—R
3
in which R
3
is C
1
-C
3
alkyl or phenyl,
in that photographic material.
描述了一种去除感光材料中污渍的工艺,该工艺包括加入至少一种式 (I) 化合物
1
其中
X 是 O 或 NH
n 是 1 或 2
p 是 0、1 或 2、
M 是氢、碱
金属原子、
铵或由胺形成的阳离子;
每个 R
1
分别是
氨基酸残基,其中
氨基上的氢原子已被去除;
每个 R
2
分别是氢、C
1
-C
8
烷基
1
-C
8
烷氧基、卤素、
氰基、COOR,其中
R 是氢或 C
1
-C
3
烷基、CONH-R(其中 R 具有其先前的意义)、SO
2
NH-R (其中 R 具有原有意义)、NH-COR (其中 R 具有原有意义)或 SO
3
M,
其中
M 具有其原有意义,或者,如果
n 为 1、
R
2
也可以是 CO-R
3
其中 R
3
是 C
1
-C
3
烷基或苯基、
在该感光材料中。