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Expired
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GB1014122A
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Individual
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Individual
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B44C5/00—Processes for producing special ornamental bodies
Abstract
200,214. Morgan, H. R. April 10, 1922. Photo-mechanical printing-surfaces. - A tablet for the preparation of originals for the photographic production of printing plates, particularly for printing " white-line " woodcuts, comprises a foundation consisting of wax or a mixture of wax with a suitable white material, and a thin black or other dark-coloured coating. The design is cut into the tablet by a burin, scraper, or other tool, gradation in the width of the white line being easily obtained by the use of a tapered tool. Preferably the foundation consists of two parts of Japan was and one part of precipitated chalk, and the dark coating of Indian ink or lampblack. Specifications 1626/72, [Class 100, Printing, Letterpress &c.], 7980/87, and 1613/98, are referred to.
GB1014122A1922-04-101922-04-10Improved means for preparing originals for the production of printing surfaces
ExpiredGB200214A
(en)
Improvements in processes for polychromatic reproduction and in colouring masses, printing plates and printing machines for carrying out these processes