| 摘要 |
PURPOSE:To display a desired pattern in a complete shape by subjecting a light transmittable plastic plate to chemical plating, then masking the plate and subjecting the plate to electroplating. CONSTITUTION:The masking material 2 consisting of a transparent material having the resistance to acids and alkalis to prohibit chemical plating is deposited on the rear surface of the light transmittable plastic plate 1. A film 3 consisting of copper, etc. by the chemical plating is then formed thereon. The desired pattern is printed on such plating film 3 by using ink which dissolves in alkalis to form the 2nd masking material 4. Ni, Cr, Sn-Ni alloy or the like is then electroplated thereon. Such plate 1 is immersed in an alkali soln. to dissolve and strip the printing ink and to expose the chemical plating film 3 in parts 4'. The exposed chemical plating film 3 is then removed by etching. The plastic plate 1 which is displayed in the pattern parts 4' by the light transmitted thereto from the rear side is thus obtd.
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