Mike Harrison wrote:
>>Why do you use UV? What is the advantage over "normal" light sensitive 
>>PCBs?
>>
>
> All 'normal' PCB material I've ever encountered is primarily sensitive to 
> UV, to the extent that you
> can handle it in normal light for the lengths of time necessary for PCB 
> making.
>
> I've never actually tried exposing with visible leight but I suspect 
> exposure times would  be pretty
> long.

The boards we used are sensitive to normal light. You can handle them either 
in subdued normal light or yellow light. Exposure time is ~5 minutes, using 
either incandescent or fluorescent bulbs.

Vitaliy 

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