"Leon" <leon355@...> writes: > What concentration is the H2O2 you are using? It was the usual 2 parts 3% H2O2 to 1 part 37% HCl. But like I said, it's been sitting for a while.
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Re: [Homebrew_PCBs] sluggish etchant
2008-06-17 by DJ Delorie
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2008-06-17 by DJ Delorie
"Leon" <leon355@...> writes: > What concentration is the H2O2 you are using? It was the usual 2 parts 3% H2O2 to 1 part 37% HCl. But like I said, it's been sitting for a while.