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Post-printing image development of ink-jet images on non-ink receptive substrates
Post-printing image development of ink-jet images on non-ink receptive substrates
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机译:非受墨基材上喷墨图像的印刷后图像显影
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摘要
A method of printing on an ink receptive coating (12) which enhances the density of images printed on non-ink receptive substrates (10) by ink-jet techniques is provided. The substrates, such as transparent polyester films, are coated with a layer of an material to a thickness which promotes controlled latent lateral diffusion of the printed ink dots (14a-c). The lateral diffusion is microscopically observed to begin immediately after printing, eventually ceasing as the vehicle of the ink is sufficiently spread and evaporated by the lateral spreading. The optical density of the image increases as the ink diffuses, reaching a maximum density that is considerably greater than otherwise possible without such an ink-coating system and avoids the undesirable surface coalescence of drops (14) which causes a puddled appearance in films not employing latent spreading. Sheets of such printed imaged media are stored in removable sheet protectors of a vapor permeable, water absorbent material such as cellulose acetate, such that dot spread is controlled within the teachings of the invention.
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