Importance

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Abstract

A method is described for forming a transparency containing images having high color density comprising the steps of: forming an imaging sheet, said imaging sheet comprising a substrate having a layer of microcapsules on the front surface and on the back surface thereof, of microcapsules containing an internal phase which undergoes a physical change upon exposure to actinic radiation, and a color forming agent which is capable of reacting with a developer-containing resing to form a visible image thereon; simultaneously image-wise exposing said microcapsules on said front and said back surfaces of said imaging sheet to actinic radiation; assembling said exposed imaging sheet between a pair of developer sheets wherein each of said developer sheets comprises a substrate having a layer of developer-containing resin on one surface thereof, said layer of developer-containing resin on each of said developer sheets contacting the adjacent surface of said imaging sheet; subjecting said assembly to a uniform rupturing and transfer force wherein said microcapsules are ruptured in an image-wise pattern and said color-forming agent contained in said ruptured capsules is transferred to said developer-containing resin wherein an image-wise reaction between said developer-containing resin and said color-forming agent produces a visible image on each developer sheet, said visible images being mirror images of each other; separating said developer sheets from said imaging sheet; assembling said developer sheets such that said visible images are in registration, said visible images being mirror images of each other; and adhering said developer sheets, one to the other, to provide a transparency having high color density.

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First Claim