At the pretreatment of base surface and chemical plating of nickel on the surface of polystyrene there are various differency by solution composition and processing. However, the best range of PH in palladium chloride solution for sensitizing was 4.0∼4.5, and the treatment was completed with one minute at the room temperature. The effective composition ratio of solution was 3:1:1 of nickel chloride, sodium hypophosphite and sodium acetate respectively, its PH was 4, and adequate temperature was over 90℃. |
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