申请人:EASTMAN KODAK COMPANY
公开号:EP0574090A1
公开(公告)日:1993-12-15
A photographic element containing a dye which when released from a coupler has a sufficiently low pKa, generally less than about 5, such that the dye remains substantially or fully ionized during coating of the film and in the produced film, results in an element containing a dye which has the desired hue without the use of additional additives, such as mordants, to keep the dye ionized. The dye is also useful in photographic elements without release from a coupler, for example, as a filter dye.
一种含有染料的摄影元素,当从偶联剂中释放出来时,该染料具有足够低的pKa,一般小于约5,因此在涂布膜和生产的膜中,染料保持大部分或完全电离,从而产生一种不需要使用额外添加剂(如媒染剂)来保持染料电离的所需色调的元素。该染料在摄影元素中也可用于不从偶联剂中释放的情况,例如作为滤色镜染料。