| 摘要 |
482,230. Photo - mechanical printing- surfaces. BEKK & KAULEN CHEMISCHE FABRIK GES., DR., and GORIG, J. May 4, 1937, No. 12758. Convention date, May 6, 1936. Addition to 458,968. [Class 98 (ii)] The process described in the parent Specification is modified by printing the picture onto the light-sensitive layer by projection and the screen by contact printing. The printings may be carried out in either order. Where the screen is printed first, it is possible to retain a stock of sensitized metal plates onto which the screen has already been printed.
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