Homebrew PCBs

Correct, I am looking for what a safely light that won't affect photoresist
(dry film photoresist in my case).  Maybe working in dim light is good
enough?  I read that dry film photoresist is fairly sensitive without taking
much to expose it though.  

 

Jeff

 

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of John
Sent: Sunday, October 07, 2012 3:45 AM
To: Homebrew_PCBs@yahoogroups.com
Subject: Re: [Homebrew_PCBs] recommend a dark room light

 

  

Are you wanting a safety light that wont affect the photo-resist or a light
to expose the photo-resist?

The ready coated presensitized boards are nowhere near as sensitive as
photographic film. 
I work with presensitized boards in fluorescent and incandescent light
without covering them.
You need light of a specific narrow wavelength to make the exposure work.

John G3UGY 

From: Jeff Heiss 
Sent: Sunday, October 07, 2012 4:38 AM
To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>  
Subject: [Homebrew_PCBs] recommend a dark room light

I am doing some tests with dry film photoresist. Can you guys recommend a
bulb that can be used for a dark room light? Are there any simple methods
to using a regular fluorescent or incandescent light for the purpose? Maybe
covering the bulb with a color saran rap as a filter?

Jeff

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