--- In
Homebrew_PCBs@yahoogroups.com, "klmjr22" <keithlmartin@...> wrote:
> I looked at the Household products database and found tarn-x is 3-5
> sulfamic acid but also contains Thiourea which may help cleaning.I
> found that Lime Away has < 11 percent sulfamic acid acording to the
> MSDS sheet. Tried some on some BAD copper and all the dark brown areas
> turned that nice reddish color you want. The black and green areas
> appeared to clean up with some scrubbing. This stuff is readily
> available. Assuming the sulfamic acid is what you want there is a
> product called Aqua Mix Sulfamic Acid Crystals available at Lowes that
> is a 99.5 percent pure sulfamic acid crystals. Don't know what it
> costs yet. But Lime Away does work and it doesn't have a lot of exta
> stuff in it you may not want.
> Keith
I looked on the Lowes.com web page, but didn't find the Aqua Mix
Sulfamic Acid Crystals. I called my local store and they didn't have
them either. I did find an online source:
http://www.artistictile.net/store/aquamix.html$5.85 for 1 lb (makes 2.5 gallons) plus whatever postage they charge.
I'll be taking a look at the premixed Aqua Mix and other tile & grout
cleaning products at Lowes and elsewhere and looking for the crystals
just for the heck of it since Lime Away (and possibly generic
versions) will apparently do the job and can be found easily (in the
US anyway).
WB