Photographic silver halide development in the presence of thioether development activators; method, developer and photographic element
申请人:AGFA-GEVAERT
naamloze vennootschap
公开号:EP0026520A1
公开(公告)日:1981-04-08
Photographic elements containing image-wise developable silver halide are developed in the presence of an oxathioether development activator according to the formula:
wherein:
R' is H, alkyl, hydroxyalkyl, or R2-Y-(A"-X)m-A'-S-,
A, A', and A" is alkylene, with the proviso that A is a monovalent bond when R1 is hydrogen or alkyl or hydroxyalkyl,
X is -OCO-, -SO2-, -CONH-, or Y,
Y is ligand or complexing function of the type of -S- and -N(Q)-(Q = H oralkyl),
R2 is alkyl, which may be substituted by OH, or when Y is -N(Q)-, R2 together with Q may represent the atoms needed to complete a nitrogen-containing saturated ring,
n is at least 2, and m is 0 or 1.
The development activators can be used in black-and-white development or in colour development. They can be incorporated in the photographic material or in the developing solution.
In reversal processing they can also accomplish the task of the second exposure or of the fogging agent to render the silver halide remaining after the first development developable.
含有可随图像显影的卤化银的照相元件是在一种按式计算的噁硫醚显影活化剂存在下显影的:
其中
R' 是 H、烷基、羟烷基或 R2-Y-(A"-X)m-A'-S-、
A、A'和 A "是亚烷基,但当 R1 是氢或烷基或羟烷基时,A 是单价键、
X 是-OCO-、-SO2-、-CONH-或 Y、
Y 是-S-和-N(Q)-(Q = H 或烷基)类型的配体或络合函数、
R2 是可被 OH 取代的烷基,或者当 Y 是-N(Q)-时,R2 和 Q 可代表完成含氮饱和环所需的原子、
n 至少为 2,m 为 0 或 1。
显影活化剂可用于黑白显影或彩色显影。它们可以加入感光材料中,也可以加入显影液中。
在反转冲洗中,它们还可以完成第二次曝光或雾化剂的任务,使第一次显影后剩余的卤化银显影。