--- 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
>
I buy mine from the local 'health' food store for about that price. It works well. I have no idea why they sell 35% H2O2. I probably don't want to know.
As this link warns there are ∗lots∗ of scammers out there, and probably even more who wouldn't know a weight/volume percentage from a volume/volume percent, molar percentage, percent normal, or any of the other things that a 'percent' solution might represent.
Fortunately, this is not a particularly twitchy application, and a range of concentrations can work.
-- Dave