Bright dip for copper

[Bertonus Metalworks]

I'm looking for a way to get a bright, clean finish on
copper via chemical means. Does anyone have a recipe for a
bright dip that works well with copper? Is there a
commercially available copper bright dip? Alternatively,
does anyone have a recipe for an electropolishing solution
that works well with copper? Thanks.

Bert

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[TCollins]

There are two differnt basic bright dips for copper. One is chromic acid
which should be avoided because it is extremely toxic and dangerous.

I have a copper bright dip that uses sulferic acid and hydrogen peroxide as
well as a proprietary cleaning additive. A mild acid dip is used afterwards
to desmut the copper.

I usually sell it to make 5 gallon quantities.

I will have to check on a price at the office tommorow. It is not expensive.

Bright dip will polish copper somewhat so you may not need an electropolish.

te...@goldtouchinc.com
or http://www.jewelryplating.com

[Marilee J. Layman]

On Wed, 17 Jul 2002 01:30:28 GMT, Bertonus Metalworks
<bert...@yahoo.com> wrote:

>
>I'm looking for a way to get a bright, clean finish on
>copper via chemical means. Does anyone have a recipe for a
>bright dip that works well with copper? Is there a
>commercially available copper bright dip? Alternatively,
>does anyone have a recipe for an electropolishing solution
>that works well with copper? Thanks.

Lemon juice (okay, it's commercially available in the grocery store)
and catsup (same) both work for copper.

--
Marilee J. Layman
Bali Sterling Beads at Wholesale
http://www.basicbali.com

[Tony]

Lemon juice (citric acid) or katsup (acetic acid)will not give you a BRIGHT
dip for copper. Nitric acid will.