About etching pcbs- I recently enjoyed etching with hardware store=20
muriatic acid and drugstore hydrogen peroxide. when you are done with=20
the solution, neutralize the acid and precipitate the copper with baking=20
soda. Trash the solids and down the drain with the now harmless water. I=20
was using the laser printer on toner transfer paper

http://www.pulsarprofx.com/pcbfx/main_site/pages/products/transfer_paper.ht=
ml

  -- I had not much good luck with glossy magazine paper method

The etchant:   "Mix two parts hydrogen peroxide for every one part=20
hydrochloric acid. When mixed, they form a substance that is a severe=20
skin irritant, and will produce toxic chlorine gas."

http://www.wikihow.com/Etch-a-Circuit-Board
--=20

Looking forward,
Al Shinn

--=20
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