EP 0640225 A1 19950301 - AQUEOUS MIXTURES OF SPECTRALLY SENSITIZING DYES FOR PHOTOGRAPHIC EMULSIONS.
Title (en)
AQUEOUS MIXTURES OF SPECTRALLY SENSITIZING DYES FOR PHOTOGRAPHIC EMULSIONS.
Title (de)
WÄSSRIGE FARBSTOFFSUSPENSIONEN ZUR SPECTRATEN SENSIBILISIERUNG PHOTOGRAPHISCHER EMULSIONEN.
Title (fr)
MELANGES AQUEUX DE COLORANTS DE SENSIBILISATION SPECTRALE POUR EMULSIONS PHOTOGRAPHIQUES.
Publication
Application
Priority
US 9204024 W 19920514
Abstract (en)
[origin: WO9323792A1] A process is provided for preparing concentrated dye-water compositions for spectrally sensitizing photographic emulsions in the absence of a solvant or surfactant which comprises adding a sensitizing dye having a solubility in water as low as about 0.005 weight percent to water or a water-polymer medium with agitation at a temperature of from about 20 DEG to about 50 DEG C and continuing agitation for from about 30 minutes to about 5 hours.
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/015 (2006.01); G03C 1/06 (2006.01); G03C 1/10 (2006.01); G03C 1/12 (2006.01); G03C 1/14 (2006.01); G03C 1/83 (2006.01)
CPC (source: EP)
G03C 1/005 (2013.01); G03C 1/14 (2013.01)
Citation (search report)
See references of WO 9323792A1
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
WO 9323792 A1 19931125; DE 69227322 D1 19981119; DE 69227322 T2 19990311; EP 0640225 A1 19950301; EP 0640225 B1 19981014; JP 3309979 B2 20020729; JP H07506438 A 19950713
DOCDB simple family (application)
US 9204024 W 19920514; DE 69227322 T 19920514; EP 92912683 A 19920514; JP 51200093 A 19920514