-- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

topic 10063

Black oxidation develops on white gold

When I work out white gold jewelry pieces I get that blackish oxidation on the worked out items. I have tried to dip the pieces when hot in diluted Sulphuric acid, but the work seem not to whiten out easily, and that blackish sooty color often remains on certain parts. What is the best whitening solution can I use to have the worked out items clean and free from basic oxides?

Joseph T


You need to protect the surface of your jewelry from oxidation before you heat it. Make a solution of fine Boric Acid Powder [linked by editor to product info at Amazon] and alcohol to dip your jewelry, let dry and this will create a protective film which your diluted acid will dissolve after your soldering operation.

Neil Bell
Red Sky Plating

supporting advertiser
Albuquerque, New Mexico
red sky banner ad

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A to THIS thread START a NEW THREADView This Week's HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2017     -    Privacy Policy
How Google uses data when you visit this site.