EP 0317886 B1 19940316 - Gradation-variable black and white paper.
Title (en)
Gradation-variable black and white paper.
Title (de)
Gradationsvariables SW-Papier.
Title (fr)
Papier noir et blanc à gradation variable.
Publication
Application
Priority
DE 3739766 A 19871124
Abstract (en)
[origin: JPH01167745A] PURPOSE: To eliminate resensitization by incorporating a specified compound in a photosensitive silver halide emulsion having an absorption maximum in a shorter region than a prescribed value and mixing this emulsion at least with another emulsion having the absorption maximum in the longer region. CONSTITUTION: The coating solution of the silver halide emulsion to be used for coating a support is formed by mixing the emulsion having the absorption maximum in the region of 480-580nm with at least another emulsion having it in a shorter region, and the emulsion having it in the region shorter than 480nm contains the compound represented by formula I in which X is an atomic group necessary to form a benzo- or naphtho-condensed heterocyclic group or the one containing another substituent, thus permitting resensitization to be eliminated.
IPC 1-7
IPC 8 full level
G03C 1/06 (2006.01); D21H 27/00 (2006.01); G03C 1/005 (2006.01); G03C 1/035 (2006.01); G03C 1/12 (2006.01); G03C 1/34 (2006.01); G03C 1/46 (2006.01)
CPC (source: EP US)
G03C 1/035 (2013.01 - EP US); G03C 1/12 (2013.01 - EP US); G03C 1/346 (2013.01 - EP US); G03C 2001/03564 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE ES FR GB NL
DOCDB simple family (publication)
EP 0317886 A2 19890531; EP 0317886 A3 19901227; EP 0317886 B1 19940316; DE 3739766 A1 19890608; DE 3888461 D1 19940421; ES 2050139 T3 19940516; JP 2622407 B2 19970618; JP H01167745 A 19890703; US 5006455 A 19910409
DOCDB simple family (application)
EP 88119074 A 19881117; DE 3739766 A 19871124; DE 3888461 T 19881117; ES 88119074 T 19881117; JP 28902588 A 19881117; US 26999388 A 19881110