Imaging media capable of displaying sharp indicia

Details Imaging media capable of displaying sharp indicia Imaging media capable of displaying sharp indicia

G - Physics

03

G

42/10, 42/2

G03G 5/00 (2006.01) B41M 5/00 (2006.01)

Patent

CA 1151869

ABSTRACT Improved sheet material of the type wherein a base sheet is coated on at least one face with a layer comprising a film-forming polymer containing inter- connected microvoids, the layer being locally trans- parentizable to display contrasting indicia when there is applied to its exposed surface a transparent, colorless liquid which has a refractive index similar to that of the solid constituents of the layer. A substance which jellifies the liquid is incorporated in the layer, whereby the indicia maintain substantially the same dimensions throughout the time that the layer is locally transparentized.

382556

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