No registration, no passwords; no pop-up ads -- just aloha, fun, & authoritative answers.
As an eBay Partner & Amazon Affiliate we receive compensation for qualifying purchases.
Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub  Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Colouring of Gold or Brass




Dear Finishers

I would like to colour the gold with pink, green, white, black and yellow (& other possible colours). I would like to try the same colours on brass too.

If you could give some formulations and processing conditions for the above colourings, I would be greatly obliged. The process can be either a dip process or electrolytic, but at room temperature.

I thank you in advance for the help.

Regards,

Dr.K. Murugan
- Mumbai, India
1999



similarly2 2001

Dear Finishers:

I would like to colour the gold with pink, green, white, black and yellow (& other possible colours). I would like to try the same colours on brass too.

If you could give some formulations and processing conditions for the above colourings, I would be greatly obliged. The process can be either a dip process or electrolytic, but at room temperature.

I thank you in advance for the help

Aladdin Meraji
- Eagle Pass, Texas



Please give me answer question thread no 3970.

Thank you,

Arun Sharma
electroplater - Meerut, UP, India
2002



2003

Different colors for brass(luster series):
copper acetate [affil link]......25 gm
citric acid [on eBay or Amazon affil link] ........ 30 gm
sodium thiosulphate [on eBay or Amazon affil links] ..280 gm
water...............1 lit
Cold immersion(25-30 C)

Sequence(on brass):golden yellow-copper color-violet-dark blue-light blue-chrome color-nickel color-reddish gray.

This colors can be lacquered. According to literature this colors can be obtained on gold, platinum, silver,nickel and iron(only blue). Instead of copper acetate you can use lead acetate and instead citric acid potassium tartrate. Pranam!

Goran Budija
- Cerovski vrh Croatia




(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact  -  Privacy Policy  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"