| 摘要 |
1,191,013. Coating with metals. DOLLFUS MIEG & CO. and L. MOLINARI. May 2, 1967, No.20305/67. Addition to 1,155,862. Heading C7F. Aluminium or aluminium alloy sliding clasp fasteners are electroless plated, whilst on their stringers, with Zn, Cd, Sn or Cu. The Al may be coated first with Zn, then Cd, then Cu. Examples of solutions are (g.11.):- Cu CN 22, Na CN 32, NaOH22, and Rochelle salt 22 or ZnO32, NaOH96, and Rochelle salt 150. |
