Homebrew PCBs

Stefan Trethan wrote:

> On Fri, 15 Apr 2005 16:46:42 -0400, Alan King <alan@...> wrote:
>
> 
> It is faster at the bottom, where the bubbles hit.
> Sloped sides sound interesting, any idea how much?
> 
> I had streaks from the bubbler-holes, but i'm gonna fight that with a  
> porous bubbler.
> 

   Nope, would take some tests.  Just a flat plate in the bottom corner leaning 
in at an angle should give an idea.  Just occurred to me off the top of my head 
that the bubbles are giving less action from spreading out horizontally and 
joining together as they rise when I read your last message.  A wedge pushing 
them back towards the board should do a lot for it.

>
> Don't like moving the board much 'cause it requires a pretty firm hold on  
> the board. I have a rather nice board holder
> design that clamps the board without needing to wash anything or use  
> gloves etc., the downside is it can't be super-strong hold.
> 
> 

   Well I was thinking clamp the board through the thickness on either side.. 
Most important is if it etches well, an easy and suitable board holder can 
always be figured out later.  I like the idea and have a vibrating point etcher 
for marking metal, may have to try it out along with the silicone caulked paper. 
  I've got a few small test boards to do in the next few days anyways.  Last few 
prints have been light, wondering if my printer is low on toner though it's 
about time..

   Should have occurred to me earlier, it's the same idea behind a parts 
cleaner.  A $100 parts cleaner might do an excellent job for both cleaning and 
etching with one piece of equipment.  So many are only watch sized now

Alan