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Plated layer type	pigment	Plated thickness（μm）	SST(h)
Trivalent chromium blue white zinc	White blue	4—10	12-24
Trivalent chromium color zinc	undertint	4—10	＞24
phosphorization	gray	/	4—8
Nickel copper nickel	silvery	10—30	＞24
Black nickel	Metal black	10—30	＞24
Nickel + tin	silver	10—30	＞48
Nickel + silver	silver	10—30	＞48
Nickel + gold	golden	10—30	＞48
epoxy black	black	10—30	＞24
epoxy white	white	10—30	＞48
Nickel copper + epoxy black	black	20—40	＞48
Nickel + epoxy black	black	20—40	＞48

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