EP 1382998 A1 20040121 - Method of preparing a silver chlorobromide emulsion
Title (en)
Method of preparing a silver chlorobromide emulsion
Title (de)
Verfahren zur Herstellung einer Silberchlorobromidemulsion
Title (fr)
Procédé de préparation d'une émulsion au chlorobromure d'argent
Publication
Application
Priority
EP 02077820 A 20020715
Abstract (en)
The invention relates to a method of preparing regular shaped non-tabular high chloride silver halide host crystals, more particularly host crystals on which silver bromide is selectively deposited on the edges and/or corners of said host crystals. Silver halide crystals are prepared, which exhibit excellent high intensity reciprocity law failure and are suitable for high intensity, short time exposure. The method comprises a nucleation and a growth step in which a first peptizer having a binding capacity to silver ions of less than 55 milliVolts measured at pH 5 and a second peptizer having a binding capacity to silver ions of at least 55 milliVolts measured at pH 5 are present during at least the growth step.
IPC 1-7
IPC 8 full level
G03C 1/015 (2006.01); G03C 1/047 (2006.01)
CPC (source: EP)
G03C 1/015 (2013.01); G03C 1/047 (2013.01)
Citation (search report)
- [XY] US 5888718 A 19990330 - MASKASKY JOE E [US], et al
- [Y] EP 0843208 A1 19980520 - AGFA GEVAERT NV [BE]
- [DY] EP 0750220 A2 19961227 - EASTMAN KODAK CO [US]
- [Y] PATENT ABSTRACTS OF JAPAN vol. 1996, no. 02 29 February 1996 (1996-02-29)
- [Y] DATABASE WPI Section Ch Week 199601, Derwent World Patents Index; Class G06, AN 1996-007499, XP002222436
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 02077820 A 20020715