Homebrew PCBs

> davel wrote::
>
> I just found a sealed bag of Kepro sensitized
> boards.  Might be 5-10 years old. Stored in
> air conditioned area.
> 
> Will they still work?   

Dont know about Keppro - but Kinsten boards will
go a bit blotchy and loose contrast after 1 or 2
years. (my boards are kept in a fridge)

I have use board that are 3 or 4 years old but
the results where average.  The amount of exposure
time needed was 3 times higher than fresh boards
and large black/copper areas didnt hold up at all
well.

I think you need a VERY high contrast phototool
to make up for the lack of contrast of the board.


> Cat#522-465G
> 4"X6"X 0.62" G10 2Oz 2 sides sensitized
> 
> Are these positive or negative?
> What developer does this use?  

Sorry cant help you there.