Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

Hi Terry,

I am interested to learn more about metal etching.

When you say "deep" what is that in mm or inches?

What etchant are you using for the brass?

Spray etch?

TIA,

Bertho



From JezusJonz Sent: Sunday, February 19, 2012 20:09




Hi Mark, I've been using Pulsars TTF and Green film for about 2 years now. I
using a Lexmark E234. When using it with my printer when I print my sample
off on bond I lay another sheet of bond paper over it and then tape my
pulsar paper to it. Sometimes the printed sheet will curl and then jam on
the second pass with the pulsar attached. I dont make circuit boards but
etch brass for sometimes up to 4 hours or longer. With very fine lines and
details. The main thing is to find you a toner that works and use it. They
say to buy manufactures toner but at 4 to 5 times the cost...I'll pass.
On the laminator I use his GBC an older version than what he has now and
have never moded it and it works just fine right out of the box.
I will say Ive had failures because of what I etch and how much I have to
brush and clean to get a deep etch. But for a board I would think using it
some Radio Shack Ferric Chloride. One bottle of it should net a large number
of boards. If not try saltwater and a rectifier. You can make a gallon of
etchent for dollar.
Later Terry



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