Homebrew PCBs

Quoth Adam Seychell at 2008-06-05 18:23...
> They could be a different brand/formula photoresist. could you explain 
> what problems you had ? Is it negative or positive resist ?
> Was it a exposure, developing issue, or copper residue problem. The only 
> problem I've experienced with aged resists (>2 years) is a stubborn 
> residual invisible film left behind on the copper surface after 
> developing. It requires rigorous developing to remove it, and etching to 
> remove the rest.

Adam - I'll fire the same question back at you - with which brand did 
you have this specific problem - Kinsten?  If so, I'd be interested to 
hear as I've got a load of "mature" Kinsten stock that I'm about to use, 
having been out of the game for a couple of years.


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Matthew Smith
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