Letter 1114

Bronze plating solution

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I want to make a bronze plating solution and the preplate needed. The bronze must have hardness more than 40 Rc.

Please give me the chemicals percentage to make the solution that you recommend.

Thank you.

Remberto Brito
S.A. de C.V.

Remberto,

Macdermid have a bronze solution that we use for antique gold and nickel free plating for jewellery. I do not know the hardness but you could try Macdermid Inc.

Regards

Bob Lynch      plating company Sydney, Australia

Mr. Brito

We also use some MacDermid Inc. chemicals to make up a Bronze plating bath. We use oxygen free copper anodes, potassium stannate, potassium hydroxide, potassium cyanide, and Rocheltex.

Concentrations are as follows:

Copper 5 oz\gal
Stannate 1.5 oz\gal
Hydroxide 0.7 oz\gal
Cyanide 5 oz\gal

If you have any questions about vendors or plating process, please contact me.

Sincerely

Wes Yancey
General Electric

Dear reader,

I would like to produce a bronze patina/finish on a set of plain metal door hinges so that these fittings will blend with the overall appearance of the door.I was informed that a simple method involved soaking the metal hinges in a solution of ammonia.Is there any truth in this recommendation.If not can you suggest a method which is not too involved and does not rely on the use of chemicals which release harmful gases.Thank you for your help in this matter.

Joseph Hayek