Would swimming pool muriatic acid ( 14% ) work? We always have a lot of that laying around...to maintain our pool.
- Jerry KF6VB
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On 2021-04-27 13:22, Mark - N7EKU wrote:
Hi,
I switched a long time ago to the hydrogen peroxide method. I use
hydrogen peroxide from the drug store combined with HCl, hydrochloric
acid. The acid is available at hardware stores, sold as concrete
etchant/cleaner.
This method is really nice for a lot of reasons. It doesn't stain
things like ferric chloride does. It's a light green colored clear
solution, so it's very easy to inspect your etching as it goes. I use
a clear glass plastic box and put a strong light underneath so you can
see the traces perfectly.
Also, I've never tossed any of the solution yet. You can just keep
using it over and over again. If it get's real slow, I just add a
pinch more peroxide.
I also use the magazine paper for toner transfer. The paper needs to
be what is called "clay coated", which is what gives magazine paper
the glossy smooth look. You can buy blank paper like that, but using
magazine paper is one of the three R's (re-use!)
73,
Mark
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