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Subject: Re: [Homebrew_PCBs] Re: H2O2 in the UK

From: Leslie Newell <lesnewell@...>
Date: 2007-01-21

Last time I got some, I was told by the shop owner that the strongest
they are allowed to sell these days is 17%.

Les


Stefan Trethan wrote:
> Yes, but the added water would grow your etchant too much.
> I think for CuCl you _do_ need the stronger stuff.
>
> Maybe one can freeze concentrate the 3% stuff, i never tried, and it would
> surely be safer and cheaper to just buy the 30% version.
>
> ST
>
>