yeah cool site i just have not been on the computer a lot and i dont think i will be on for a while. i am going to shave my head tommarow for my friend who has cancer
Relating to etchants, I'm very pleased with muriatic acid + hydrogen peroxide, as many of the sites referred to earlier, describe. Dirt cheap, excellent etch, transparent (greenish) while etching and faster than ferric chloride.
Muriatic acid is available at hardware stores for cleaning concrete and stone. It's a stock 28% sulphuric acid, add twice the volume of drugstore hydrogen peroxide (3%) before etching. Mix only what you need at the time.
You can deplete the waste etchant with some chunks of scrap copper (leave in for a day or so) and then neutralize with baking soda before disposing.
I've gotten a big improvement in my laser toner bonding by pre-etching the copper board with a weak solution of same before ironing on the toner image.
Just etching the board enough to turn it a matte, deep copper color from shiny bright. I believe it gives the board a sort of "micro-tooth" to adhere to.
Naturally, be careful with the etchant, it is acid. Good luck.