Homebrew PCBs

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On 14-04-11 20:11, Tom Biery wrote:
> I have recently used some positive resist boards from eBay and am expereinceing 
> exposure times of up to twice as long as the times it is taking for the positive 
> resist boards bought from Circuit Specialists.  
> 
> 
> Is this because they are old or defective?  
> 
> I have a UV exposure box and the eBay boards take 150 seconds and the new 
> Circuit Specialists boards only take 80 seconds?  
> 
> 
> Please tell me what you think?
> 
> Thanks, Tom


Old boards.

I have some scraps that I bought 3 years ago and they need 2.5+ times
longer exposure. But, I always buy fresh boards localy so scraps are
just for fun :)

- -- 
Best Regards,
Zoran A. \u0160\u0107epanovi\u0107
zastos@...
http://zastos.com
+381 63 609-993

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You never find the article until you replace it.
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