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Current content: 159 679 824 patent documents

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164 112 new documents added

576 445 documents amended

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EP 0324426 A2 19890719 - Process for forming super high contrast negative images.

Title (en)

Process for forming super high contrast negative images.

Title (de)

Verfahren zur Erzeugung von extrem hochkontrastreichen negativen Bildern.

Title (fr)

Procédé pour former des images négatives à très haut contraste.

Publication

EP 0324426 A2 19890719 (EN)

Application

EP 89100317 A 19890110

Priority

JP 344588 A 19880111
JP 344688 A 19880111

Abstract (en)

A process of forming super high contrast negative photographic materials in a developer having a pH of from 9.6 to 11.0 wherein the photographic material contains a hydrazine compound and a nucleation accelerator.

IPC 1-7

G03C 1/10

IPC 8 full level

G03C 1/06 (2006.01)

CPC (source: EP)

G03C 1/061 (2013.01); G03C 2001/108 (2013.01)

C-Set (source: EP)

G03C 1/061 + G03C 2001/108

Designated contracting state (EPC)

DE FR GB IT

DOCDB simple family (publication)

EP 0324426 A2 19890719; EP 0324426 A3 19901212; EP 0324426 B1 19960619; DE 68926687 D1 19960725; DE 68926687 T2 19970306

DOCDB simple family (application)

EP 89100317 A 19890110; DE 68926687 T 19890110