Homebrew PCBs

On Thu, 30 Jun 2005 15:06:41 +0200, lcdpublishing  
<lcdpublishing@...> wrote:

> Hi All,
> With regard to chemical etching of boards, what chemicals or materials
> are good for resist?  I know there are resist pens, but I am unsure of
> what the "Ink" is actually made of.  I also know that toner, which is
> primarily plastic, works as a resist.
> Just working on some ideas for alternative ways to apply resist.
> Chris


The pens don't seem to work properly with CuCl, esp. if the pen isn't  
totally fresh any more (less ink).

I tried a silver marker which puts down a really thick layer (you know the  
kind for writing on black) but it didn't hold up well.


Acrylic laquer works.


You really should try EDM, with your CNC experience and all.

ST