Ink jet method with improved tonal range
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Sep 1, 1999
filing date -
Sep 14, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is disclosed for making on a transparent receiver material a continuous tone image, e.g. for medical diagnostic purposes, with an obtainable maximal transmission density in the visual region greater than 3.0, by means of ink jet. The method comprises ink-jetting combinations of at least one liquid black pigmented ink and at least one liquid grey ink to a transparent receiver comprising an ink receiving layer, a transparent support and a backing layer, said ink receiving layer comprising a N-containing polymer, preferably gelatin, as binder, and being substantially free of particles having an average size larger than 1 .mu.m. Preferably the transparent receiver exhibits a haze value between 10 and 20%, determined according to standard test ASTM D 1003, due to the presence of a spacing agent in the backing layer.
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