EP 0503700 A1 19920916 - Method for the preparation of iodobromide emulsions containing monodisperse tabular grains.
Title (en)
Method for the preparation of iodobromide emulsions containing monodisperse tabular grains.
Title (de)
Verfahren zur Herstellung von Jodobromid-Emulsionen, die monodisperse tabulare Körner enthalten.
Title (fr)
Méthode pour la préparation d'émulsions d'iodobromure contenant des grains tabulaires monodispersés.
Publication
Application
Priority
- EP 92200498 A 19920220
- EP 91200508 A 19910308
Abstract (en)
A method is disclosed for the preparation of a silver bromide or iodobromide emulsion containing monodisperse tabular grains accounting for at least 50 % of the total projected area of all grains, wherein the coëfficiënt of variation of the grain size distribution of said tabular grains is at most 15 %, characterized in that an aminoazaindene is added at any stage of the emulsion preparation before 50 % of the total silver halide is precipitated. Preferred classes of aminoazaindenes are adenine derivatives and 4-amino-pyrazolo-pyrimidine derivatives. Most preferred substances are adenine and 4-amino-pyrazolo[3,4d]pyrimidine.
IPC 1-7
IPC 8 full level
G03C 1/005 (2006.01); G03C 1/07 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 1/07 (2013.01)
Citation (search report)
- [AD] EP 0288949 A2 19881102 - DU PONT [US]
- [A] JOURNAL OF INFORMATION RECORDING MATERIALS vol. 14, no. 1, January 1986, BERLIN, DD pages 21 - 35; M.SZÜCS, P.KISS: 'Der Einfluâ der Struktur von Purinderivaten auf das Wachstum von Silberbromidkristallen'
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 92200498 A 19920220