Homebrew PCBs

On Sat, 22 Apr 2006 23:04:55 +0200, Zoran A. Scepanovic <zastos@...>  
wrote:

> Spray  is  knowh  as PausKlaar (sorry no um... on my keyboard). Still,
>
> with  my  monthly  erarnings,  a  price  of 7.5 EUR per meter of 355mm
>
> graphic  film  at  the  prepress  office, I can afford to wait for the
>
> PCB's  to  be  produced  in  2 to 3 hours. For twiddling with LJ's and
>
> other stuff, time is money, and I don't have enough time.

You don't need any um... for writing Pausklar, which is what it is called  
here.
It's a great label remover. Spray it on, wait a minute, and the label and  
glue peels right off.
Using it for exposing PCBs never produced good results for me.

> It's  nice that the lot folks are using TT, but second hand LJIII here
> still costs a lot, and bulk tonner is an ordinary s***t.

I dunno where you live, but a laser printer is not that much more  
expensive than a inkjet. Remanufactured toner didn't work out for me  
either, but others report good results with non-original toners. LJIIIs  
can be bought at ebay for less than 10eur here.

> For  realy  urgent  stuff,  I  print  the  velum  on  mu oldie Fujitsu
> PrintPartner  10V  (with  the  tonner  above  mentioned), exposing the
>
> vellum  to  PVC  diluent  vapours  for  approx  5 minutes, letting the
>
> diluent  to  dry  (using  forced  air  heather  if necessary) and then
>
> transferring  the  artwork  to  the  presentisized boards using the UV
>
> lamps  (photos  in  the Files section of this Group), and then etch in
>
> HCL+H2O2  solution.  This  procedure  saves  me TIME and is keeping my
>
> nerves  COOL.  Works straigh 'from the box' no twiddlies, twaddlies or
>
> whatsoever.

Yes, i have heard about the "solvent vapor" trick, i want to try for ages  
to see for myself what happens...

ST