On Sun, 21 Jan 2007 17:17:05 +0100, mycroft2152 <
mycroft2152y@...>
wrote:
> I always liked the post where the pcb maker was going to "distill'
> the H2O2 to make it stronger.
> ;)
> Myc
I think you can freeze concentrate it without too much trouble. Those
interested in using it as rocket fuel know more about that, there are some
pages about that. But i highly doubt it would be worth the effort for
etching, even evaporating etchant to get rid of excess water would seem
easier.
If you try anything like that you should definitely get a hydrometer to
measure the actual H2O2 concentration.
ST