Composite black and white substrate for color proofing films
AssigneeHoechst Celanese Corporation
InventorsRobert J. von Trebra, Dennis J. Bellville
Life of this patent
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Abstract
A composite film article which is a flexible, heat resistant polymeric film material having a non-opaque, partially translucent white surface side, having a visible light opacity of from about 0.90 to about 0.99; and a non-opaque, black surface side having a visible light opacity of less than 1.0, a transmission density of less than about 2.0 and a thickness of less than about 5.0 microns. The article may be used as a base for images such that the images have a reduced optical dot gain.
Claims14
A composite film article comprising a flexible, heat resistant, polymeric film material having two sides, a first non-opaque, translucent white side, having a visible light opacity of from about 0.90 to about 0.99;
- and a second non-opaque, black side having a visible light opacity of less than 1.0, a transmission density of less than about 2.0 and a thickness of less than about 5 0 microns.
Dependencies are inferred from the claim text.