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
