Hot melt ink projection transparency

Details Hot melt ink projection transparency Hot melt ink projection transparency

B - Operations, Transporting

41

M

117/160, 88/85

B41M 5/26 (2006.01) B41M 1/30 (2006.01) B41M 3/00 (2006.01) B41M 7/00 (2006.01)

Patent

CA 1317492

Hot Melt Ink Projection Transparency Abstract In the particular embodiments of the invention described in the specification, a projection transpar- ency includes a transparent substrate (20) and an ink pattern disposed on one surface of the transparent sheet in the form of three-dimensional ink spots (21) having curved surfaces (22) with a radius of curvature of at least 0.008cm and an angle of contact with the substrate of no more than about 25°. The transparency is prepared by applying ink drops to the substrate and maintaining the ink at a temperature above its melting point for a selected time such as 0.5 to 10 seconds. Thereafter, the ink is cooled rapidly to reduce crys- tallization and frosting and thereby reduce light transmission losses in the ink to less than 50%. (Fig. 2)

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