EP 0962815 B1 20030115 - Recording material with improved image tone and/or stability upon thermal development
Title (en)
Recording material with improved image tone and/or stability upon thermal development
Title (de)
Aufzeichnungsmaterial mit verbessertem Bildton und/oder verbesserter Lagerfähigkeit nach thermischer Entwicklung
Title (fr)
Produit d'enregistrement ayant un ton de l'image et/ou l'aptitude au stockage amélioré après développement thermique
Publication
Application
Priority
- EP 99201712 A 19990525
- EP 98201961 A 19980606
Abstract (en)
[origin: EP0962815A1] A recording material comprising a support and a thermosensitive element comprising silver palmitate, an organic reducing agent therefor in thermal working relationship therewith and a binder, characterized in that the silver palmitate is not associated with mercury and/or lead ions and when the recording material is irradiated with a copper K alpha 1 X-ray source the ratio of the sum of the peak heights of the X-ray diffraction lines attributable to silver palmitate at Bragg angles, 2 THETA , of 4.01 DEG , 6.049 DEG , 8.031 DEG , 10.06 DEG , 12.08 DEG and 14.09 DEG to the sum of the peak heights of the X-ray diffraction lines at Bragg angles, 2 THETA , of 25.60 DEG , 35.16 DEG and 43.40 DEG of NIST standard 1976, rhombohedral Al2O3, determined with the same X-ray diffractometer in the same state of adjustment on a sample of the recording material and a sample of the NIST standard 1976 cut to fit a sample holder of the X-ray diffractometer, divided by the square root of the quantity of silver in the recording material, expressed in g per m<2>, is greater than 3.09 m/g<0.5>; and a process for producing particles of substantially light-insensitive organic silver salt comprising silver palmitate with these X-ray characteristics in the substantial absence of organic solvent.
IPC 1-7
IPC 8 full level
G03C 1/498 (2006.01)
CPC (source: EP)
G03C 1/49809 (2013.01); G03C 1/4989 (2013.01)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
DOCDB simple family (application)
EP 99201712 A 19990525