Recording material with improved shelf-line producing prints upo

Details Recording material with improved shelf-line producing prints upo Recording material with improved shelf-line producing prints upo

1999-06-01

2000-10-03

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Thermographic process

Heat applied after imaging

430617, 430618, 430619, 430620, G03C 1498

Patent

active

061271020

ABSTRACT:
A recording material comprising a support and a thermosensitive element containing silver stearate, an organic reducing agent therefor in thermal working relationship therewith and a binder, wherein the silver stearate is not associated with mercury and/or lead ions and when the recording material is irradiated with a copper K.alpha..sub.1 X-ray source the ratio of the sum of the peak heights of the X-ray diffraction lines attributable to silver stearate at Bragg angles, 2.THETA., of 2.THETA., of 3.62.degree., 5.45.degree., 7.30.degree., 9.04.degree., 10.97.degree. and 12.71.degree. to the sum of the peak heights of the X-ray diffraction lines at Bragg angles, 2.THETA., of 25.60.degree., 35.16.degree. and 43.40.degree. of NIST standard 1976, rhombohedral Al.sub.2 O.sub.3, 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.sup.2, is greater than 2.2 m/g.sup.0.5 ; and a process for producing particles of substantially light-insensitive organic silver salt comprising silver stearate with these X-ray characteristics in the substantial absence of organic solvent.

REFERENCES:
patent: 5891616 (1999-04-01), Gilliams et al.

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