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Want Sticky Patina for Larger Objects



July 15, 2010

I am making some copper ornaments that I wish to treat and give a green or blue finish. They are too large to submerge in a patina solution or bury in sawdust.

Can anyone suggest a method of making a patina that will stick to the ornament while it is working, but can be washed off when finished? I have thought about mixing in sugar, but I suspect that I will not really work.

I am working in a domestic garage, so will need something that is not too caustic or dangerous and is reasonably easy to obtain.

Thank you.

James.

James Alford
Currently a hobby with a view to selling. - Aylesbury, England



July 19, 2010

Mix patina and corn starch,as patina solution you can try 250 gm ammonium carbonate/250 gm ammonium chloride solution/ 1 lit water(less chloride=more bluish hue/less carbonate more yellowish).If you want more natural look pretreat with liver of sulphur solution(2% is ok).Hope it helps and good luck!

Goran Budija
- Cerovski vrh Croatia



July 20, 2010

Dear James ,
You can try starch, gelatin, agar agar, calcium sulfate, barium sulfate.
Good luck

Cair Shishani
Khair Shishani
aircraft maintenance - Al Ain, UAE


July 20, 2010

Goran,

Thank you for this suggestion. I will give it a try. Can you give any idea of the amount of starch needed? Also, does it all wash off afterwards or do you leave it on?

Thank you.

James.

James Alford
- Bucks, England



July 23, 2010

James

A common way of thickening chemical solutions is to add methyl cellulose - commonly known as wallpaper paste. Avoid the fancy brands. Go for the cheapest and dissolve in your patination solution instead of water.

geoff smith
Geoff Smith
Hampshire, England



July 28, 2010

I think that it must as thick as honey. Geoff's advice is good too (wallpaper glue). For slower evaporation some glycerine can be added. Try it first on some copper scrap -- hope it helps and good luck!.

Goran Budija
- Cerovski vrh Croatia



August 1, 2010

Thank you for the suggestions. I shall have a play with both cornflour and paste and see how I get on.

Regards,

James.

James Alford
- England


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