EP 0921434 A1 19990609 - Thermographic recording material with improved image density and/or image gradation upon thermal development
Title (en)
Thermographic recording material with improved image density and/or image gradation upon thermal development
Title (de)
Thermographisches Aufzeichnungsmaterial mit verbesserter Bilddichte und/oder Gradation bei der thermischen Entwicklung
Title (fr)
Matériau d'enregistrement thermographique à densité d'image et/ou gradation améliorée pendant le développement thermique
Publication
Application
Priority
- EP 98203791 A 19981110
- EP 97203833 A 19971206
- US 7267598 P 19980127
Abstract (en)
A recording material exclusive of a thermal bleachable dye comprising a support and a thermosensitive element comprising an organic silver salt, an organic reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the recording material is exclusive further contains non-halide-ion-containing arylonium compound exclusive of compounds according to formula (I): <CHEM> wherein La is a valence bond or a divalent or trivalent linking group, L2 is an alkylene group, each of Ra and Rb is a hydrogen atom or monovalent substituent group, M1 is an onium ion, Ra and Rb may form a ring taken together and D is an electron donative group of atoms, with the proviso that where D is a hydrazino group which is not a part of a semicarbazido group, no oxo group is substituted to the carbon atom which is directly attached to a nitrogen atom of the hydrazine; and a recording process therefor.
IPC 1-7
IPC 8 full level
G03C 1/498 (2006.01)
CPC (source: EP)
G03C 1/49845 (2013.01); G03C 1/4989 (2013.01)
Citation (search report)
- [PX] US 5714311 A 19980203 - COWDERY-CORVAN PETER J [US], et al
- [AD] US 5395747 A 19950307 - HELLAND RANDALL H [US], et al
- [PDA] EP 0838722 A2 19980429 - FUJI PHOTO FILM CO LTD [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 98203791 A 19981110