EP 0422462 B1 19950906 - Colour photographic recording material with couplers which release heat-stable dyes.
Title (en)
Colour photographic recording material with couplers which release heat-stable dyes.
Title (de)
Farbfotografisches Aufzeichnungsmaterial mit Farbkupplern, die thermostabile Farbstoffe liefern.
Title (fr)
Produit d'enregistrement photographique couleur avec des coupleurs libérant des colorants stables à la chaleur.
Publication
Application
Priority
DE 3933899 A 19891011
Abstract (en)
[origin: EP0422462A2] A colour-photographic recording material containing those cyan couplers which, on chromogenic development, give cyan dyes having parameters a and b such that a .(1 + b) </= 1.5, is suitable for producing colour negatives for multi-copying operation, in which a multiplicity of identical copies are successively produced from the same original, where: a is the temperature coefficient of the absorption A(T = 23 DEG C) = 1g<10>@ a = -[@] . [@] . 1.000 and b is the temperature coefficient of the absorption wavelength lambda (T = 23 DEG C) b = -[@] . [@] . 1.000
IPC 1-7
IPC 8 full level
G03C 7/34 (2006.01); G03C 7/32 (2006.01); G03C 7/38 (2006.01)
CPC (source: EP US)
G03C 7/3225 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0422462 A2 19910417; EP 0422462 A3 19910522; EP 0422462 B1 19950906; DE 3933899 A1 19910418; DE 59009617 D1 19951012; JP H03241344 A 19911028; US 5200305 A 19930406
DOCDB simple family (application)
EP 90118642 A 19900928; DE 3933899 A 19891011; DE 59009617 T 19900928; JP 26855690 A 19901008; US 58916890 A 19900927