Homebrew PCBs

On Mon, 10 May 2004 22:35:29 +0800, Jobet Claudio 
<jobetclaudio@...> wrote:

> Hi ! I read from an old issue of radio electronics one of the ways they 
> used shellac in preparing PCB's. They first dyed the stuff so that it 
> would be visible when applied. Then, they loaded the thing into a 
> technical drawing pen and used that to directly apply the shellac as an 
> etch resist onto the blank pcb.
>
> Jobet


I'm suspicious towards shellac.
I admit i have never seen it in solved state, but it somehow is linked
to a "sticky" image.
Please keep in mind that in the past it was a much more popular stuff than 
it
is today, maybe because there was no better ink around. After all we 
*have* resist
pens now, and do not longer fill schellac into drawing pens.

I tried colophony solved in alcohol in a plotter pen once. sticky mess.
not sure if schellac is that sticky or not.

ST