Homebrew PCBs

--- crankorgan <john@...> wrote:
> --- In Homebrew_PCBs@y..., Steve Greenfield <alienrelics@y...>
> wrote:
> > I have a feeling those were wax. Mylar is what the ribbon
> backing
> > is made of. So really the Alps and Fargo wax thermal are just
> newer
> > versions of that.
> Steve,
>       So the print that came off the mylar was colored wax. So
> I take it wax will repel acid if it will stay stuck to the 
> copper.

It is waterproof, so it should hold up under acid. The old ribbon
typewriters may not have used wax, might have been some kind of
plastic, but in any case it did seem to be waterproof. The Alps and
Fargo wax is waterproof. Haven't seen a wax yet that isn't
waterproof.

And it should be easy to clean off after etching. Lighter fluid
dissolves wax quickly and easily, or for fewer fumes Goo Gone or
other cleaners are available from the hardware store to clean wax
or crayon off.


=====
Steve Greenfield               // Digital photo scanning, retouching,
Polymorph Digital Photography // and photomorphing to your specs.
253/318-2473 voice           // We use the best little computer in
polymorph@...     // the world, the Amiga!
http://www.polyphoto.com/  // Based in Tacoma, WA, USA

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