Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ
The authoritative public forum
for Metal Finishing since 1989
-----
Brighteners for Gold Plating
Q. I am making a brightener for a decorative gold bath, do I want to use cobalt sulphate heptahydrate or cobalt sulphate mono-hydrate?
Jerry HammieGPEAA, Inc. - Naples, Florida
1998
1998
A. I am sorry: English not perfect...
Gold plating is very kind of bath. Generally brightener is cobalt, cadmium, indium, etc.
The concentration of brightener is usually very low include.
acid type : 0.5g/l - 1g/l
EDTA 2Na is good low current part, and as Brightener react. Organic brightener is not used yet.
Welcome to Korea 2002 world cup games...
Thank you
Kyuong min, KImplatech - suwon(2002 Worldcup game state), Korea
Multiple threads merged: please forgive chronology errors :-)
Q. I am using a citric acid gold bath, I want to make my own brightener using EDTA and Cobalt, but I need a formula for the brightener. Help!
Jerry hammie- Gold Plated Emblems
1998
A. Cobalt sulphate 9 gram, and edta 15 gram, and indium sulphate 0.4 gram
Majed Ja- Bethlehem Palestine
August 12, 2011
Q. I was wondering what citric acid does in the formula when making a bath? Also I was wondering how I can find this. I was also wondering if there is a substitute that I can use? Please help me find this and any other useful information on this topic. I will give the recipe to anyone who responds. Thank you.
Kim A [last name deleted for privacy by Editor]- McCord, Saskatchewan, Canada
2000
by Reid & Goldie
(hard to find & expensive; if you
see a copy cheap, act fast)
on eBay or
AbeBooks
or Amazon
(affil links)
A. Hi Kim. See if a library has Reid & Goldie "Gold Plating Technology". It covers everything about gold plating.
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Luck & Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q. Hello please send me the latest formulas of the best ways for gold plating and chrome plating if required. If you have any books about this subject please send me.
Khaled Sibai- Suadi arabia
2000
A. Hi Khaled. I suggested an excellent gold plating book above. For chrome plating I suggest your start with our "Introduction to Chrome Plating".
Luck & Regards,
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Q. I would like to know the formula for citric acid .
Megan Smith- Atco, New Jersey
2001
A. citric acid = C3H6O3
Rishi Aggerwal- India
2003
A. citric acid = C6 H8 O7
Samira [last name deleted for privacy by Editor]- Phoenix, Arizona, USA
2004
Q. Hello,
I currently work in a small plating shop doing hard gold plating on kovar pins, copper, nickel, gold.
We don't have access to any type of analysis, our problem is our gold looks really good for the first 5 or 6 minutes of plating then it starts to get really dull after that; we usually plate for 10 minutes.
- Alvin Texas
November 28, 2020
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