--- In
Homebrew_PCBs@yahoogroups.com, Henry Liu <henryjliu@...> wrote:
>
> I haven't used this site but it looks cheap. 1 quart of 35% for $20
> or 1 gallon for $30:
>
> http://www.dfwx.com/h2o2.htm?gclid=CNanheiu3poCFQEeDQodIH6CzQ
What I saw on that site is $35.13/Gal. + 17.41 S&H.
Just started my Tank about 6 weeks ago with this doing the 2 to 1 mix using the 3% Hydrogen peroxide, did several 8" x 12" boards pumping air into it, then had found a old copper grounding bus bar at work and put into it which might have been more than was needed as it turned very dark, even with air being pumped into it, never weighed the copper bus bar. So far just pumping air into it and have added some acid. Still looks dark green in the tank but still seems to be etching good. Think it etches better right now than the first run of boards I did in it. If I put a sample in a small glass cup it does not look so dark. Need to get me some things together to test it.
Right now I don't see that much need for a lot of Hydrogen Peroxide, just lots of air.
Use to use the Dark Brown Stuff everyone seems to hate so much, which I did not mind so much as some people seem too, just did not like it when it came time to change it and get rid of it as I had a tank that I could etch upto (4) 8" x 12" boards at a time in it so was a lot to get rid of at one time. So now I don't have to get rid of it and don't need to heat it either, so it is much better and lots cheaper. Even if I had to change it out would be Lots Cheaper. Right now I am etching one board at a time floating it face down with air pumping into the tank.
Ben