To remove the toner from the PC board once it has been etched I use a few drops of methyl ethyl ketone, also known as acetone. Since it is one of th e main ingredients in fingernail polish remover, you can always use *that* stuff, and it is readily available. Apply a few drops, making sure that you spread it to cover the entire foil side of the board. Give it about ten seconds to do it's thing before removing with a piece of ScotchBrite pad. Then rinse in water. This chemical will attack many plastics and most paints, so it is best to have a glass or metal pan under it to prevent damage to your table top. Watch out for the fumes. Use good ventialation and avoid open flames, sparks, and the like. Fr. Tom McGahee ---------- > From: Bob Blick > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [OT] Best PC Board Etching Resist Method (was: hp7475 PCboard plotting)] > Date: Friday, May 21, 1999 12:51 AM > > I also use the blue, it works the best for me. I've tried all the other > home methods. > > Lacquer thinner takes it right off. or maybe the fumes just make it seem > like it takes no time :-) I don't recall... > > Cheers, > Bob >