>Is ferric chloride the same chemical used to etch circuit boards? If so, >could one not also use the resist pen for circuit boards on brass? > I have tried the resist pen. It's OK for positive etching, but has the same problems as other resists: it lifts off if you try to etch for too long.
For negative etching you need a lot of it if you want to cover an area of any size. The asphalt seems to be a bit thicker and is easy to spread over a large area using a brush. And I am sorry, but no, I have no idea how to start a news group. I was hoping someone else might. Mike Koblic, Quesnel, BC
