The invention discloses a preparation method for
cyanide-free 18 k gold jewelries. The preparation method comprises the steps of plate making, mold pressing, opening and reversing,
alloy mold carrying, drilling, loading,
degreasing, primary activation,
copper bottoming, secondary activation, gloss
copper 1 plating, electrolytic
degreasing, ternary activation, gold water preparation, molten copperpreparation, 18 k
electroforming, gloss
copper 2 plating, demolding,
tin bismuth copper removal,
distressing, mold carrying, embedding,
welding, combination,
polishing, cooling, deoiling, electrolyticdegreasing,
gold plating, pure
water washing,
drying, quality inspection, character printing, packing and delivery in sequence; and then, the
cyanide-free 18 k gold jewelries are obtained. The preparation method is simple in process and easy to operate, obviously improves the jewelry quality, reduces the gold loss, and contains no
cyanide-contained poisonous substance in the preparation process to achieve
environmental protection and safety; the
hardness and the
toughness of the 18 k gold jewelries are prominently improved to preferably guarantee the stability of the jewelries in the wearingprocess; and further,
electroforming liquid is excellent in stability, dispersibility and deep plating capacity, can be prepared beforehand for future use, and improves the production efficiency.