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Subject: Re: [Homebrew_PCBs] Re: trying to do the right thing

From: "Ron Yost" <musik42@...>
Date: 2013-03-11

> The H2O2 I get from the drug store all say 3% on their labels. It works
> very well and quickly in my H2O2+HCl etchant. I've seen "food grade" H2O2
> at 35% used in food processing and a number of alternative-health
> preparations (they actually drink the stuff--whoa!--though probably not
> without dilution). Google "food grade H2O2." You'll find lots of
> suppliers, including Amazon.
>
> Todd, K7TFC

Sally Beauty Supply stores sell 30 and 40 vol. H2O2 (Hydrogen Peroxide).

Ron Yost