Steve,
So I see it as trace and etch. A sheet of something is placed
over a board. A plotter with a heated or vibrating pin traces on the
sheet sending the pads and traces onto the copper. Hmmmm
John
--- In Homebrew_PCBs@y..., Steve Greenfield <alienrelics@y...> wrote:
> --- crankorgan <john@k...> 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
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>
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