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Homebrew PCBs

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Message

Re: DATAK negative Resist

2003-11-11 by ednspace

--- In Homebrew_PCBs@yahoogroups.com, "Bob" <spoothammer@h...> wrote:
> 
> Does Datak mention anything about using a "sunlamp"...something 
with 
> some UV spectrum in it? 

Thanks for the reply Bob,

Could be part of the problem, I started with a standard sort of Grow-
lite by GE but did not know how much if any UV was in it, so switched 
to the Photoflood bulb.  

I am basing this switch on a web page where the person has made many 
boards with one using KPR, which is supposed to be very similar.  I 
don't really know how much UV the bulb I have is putting out though.  
I will dig around a bit more.  So far both lights are producing very 
similar results.

I may try another negative, right now I have very little black in 
mine because the circuit is sitting in a ground plane, traces only 
slightly seperated.  Possibly I can tell whats going on with wider 
space between light and dark areas of the negative.

Again thanks for the reply,

ED

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