Homebrew PCBs

Hi all,

has anyone already use sodium metasilicate for development ?
I've read that you can leave your PCB in it without any risk of over-development and it can last for years.


--- On Tue, 10/28/08, Jim Klitzing <wb6myc@sbcglobal.net> wrote:
From: Jim Klitzing <wb6myc@...>
Subject: [Homebrew_PCBs] Re: MG Negative Dry Film Resist
To: Homebrew_PCBs@yahoogroups.com
Date: Tuesday, October 28, 2008, 11:40 PM










    
            FYI,



For most of these dry film resists, I've found that a 15 second 

exposure in direct sunlight is about right. Rainy or otherwise cloudy 

days ruin the parade, of course.



Allow exposed film to 'age' for at least 10 minutes; then develop with 

1/2 TSP sodium carbonate (Arm & Hammer Super Washing Soda) in 8oz of 

warm water. Strip with 2 TBS sodium carbonate in 8oz hot water.



I'm getting .010 traces with excellent definition using this 

method...your results may require some experimentation from there.



Hope that's helpful, Jim




      

    
    
	
	 
	
	








	


	
	


      

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