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Formulation of white bronze plating bath?  

May 8, 2009

hello,
We are electroplaters engaged in rhodium plating business since 25 yrs. We have to expand our business to imitation jewelery and in imitation jewelery we want to use white bronze. There are many problems we are facing while using bronze such as all the jewelery has to be done two-tone so we have to do masking and to remove masking. We're using NC thinner so it takes a long process and we could not match up the production.
So is there any other way to achieve high production or is there any way that we can use bronze in pen plating because in that we can achieve large production and in less time. Can you please give us the making of white bronze bath solution? What are the chemicals and their percentages needed for making a white bronze bath?
thank you,

Hiren Dhakan
Plating shop - India

Hi Mr Hiren Dhakan,
Is your white bronze attacking in the NC thinner , will the luster last long after removal of stopoff over two tone and how do you protect this from tarnish with out doing EP.Because White bronze will loose its gloss while stripping the paint ,some times it will attack, as it is an alloy of Tin,copper,& zinc. Even if you strip paint by hand also colour of white bronze willnot match rhodium. Upon Electrophoretic lacquer, white bronze will turn into darker shade and no comparision to rhodium.

Panjala Mukesh      fashion jewelry mfgr. Hyderabad, India

Try 3-rd edition of Modern Electroplating book(1974.,page 530).More detailed decription is in German book Handbuch der Galvanotechnik(Dettner,Elze).Hope it helps and good luck!

Goran Budija
- Zagreb, Croatia