Homebrew PCBs

> 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