Homebrew PCBs

Try soaking in a little automatic dishwasher detergent. It is very caustic
and loosens the paper nicely.



On 12/31/06, daviddmcnab <david@...> wrote:
>
>   Hi,
>
> Can anyone suggest any chemicals which can dissolve paper fragments
> from a toner-transferred board without damaging the toner deposits or
> eating into the exposed copper?
>
> Background:
>
> After some experimentation with thermal toner transfer technique, I've
> been getting the best and most reproducible PCB artwork results by:
>
> 1) Laser-printing the artwork onto glossy inkjet paper (this gets me
> good quality image transfer - 'time magazine' glossy paper tends to
> distort the image)
> 2) Putting paper onto board, for 10 passes through laminator
> 3) Soaking paper+board in warm water
> 4) Peeling off the bulk of the paper (some remains stuck to board)
> 5) Removing remaining paper fragments by gently rubbing board with
> fingers under water
> 6) Using a head-magnifier and a fine knife, carefully picking off tiny
> remaining fragments of paper, taking care not to damage toner deposits
> 7) Etching in FeCl
> 8) Removing toner with acetone
>
> Biggest problem I'm having is with steps 5-6. This is a time-consuming
> process. If there was a way to get the paper off fairly quickly,
> without damaging toner or copper, that would be great.
>
> Thanks in advance for any help
>
> Cheers
> David
>
> 
>


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