C - Chemistry – Metallurgy – 25 – D
Patent
C - Chemistry, Metallurgy
25
D
204/8
C25D 1/08 (2006.01)
Patent
CA 1061279
ABSTRACT OF THE DISCLOSURE The present invention provides a process for producing screen material by the electrodeposition of a metallic deposit on the conductive portions of a smooth matrix provided with conductive and non-conductive surface portions wherein the terminal layer thickness of the screen material layer is obtained by partial layers produced in at least two deposition operations, whereby prior to the start of the following deposition operation the sides of the partial screen flanges of the partial layer deposited by the previous deposition operation and which surround the free spaces of the partial layer corresponding to the screen openings are covered with an electrically insulating material and the partial layer surface is freed from insulating material. The present invention also provides a process for producing screen printing blocks by electroplating on a conductive surface portion coated with a photoresist which is exposed by means of a diapositive having black and transparent areas with a black line screen whereby after developing and fixing on the uncovered zones corresponding to the black areas a metallic deposit is deposited, wherein the final layer thickness of the screen printing block is obtained by partial layers produced in at least two deposition operations, whereby prior to the start of the following deposition operation the sides of the partial layer deposited in the previous deposition operation are covered with an electrically insulating material and the surface of the partial layer is freed from insulating material.
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