Homebrew PCBs

At 04:47 PM 1/30/2009, you wrote:
>the last thing to touch the board is either a wipe with acetone

Don Lancaster, famed electronics writer online at the guru's lair has 
said that after chemical cleaning, the board should be quickly dipped 
into ferric chloride and then well rinsed before beginning any kind 
of PC resist coverage. he said that a truly clean copper board is the 
"pink" board that you see during etching, not the shiny brassy color 
of even a cleaned copper blank. although i've had very good results 
over the years with scores of boards by scrubbing the blanks with a 
brass-bristled brush in a sudsy ammonia bath and then a good rinse. i 
learned this trick from an old antiques dealer who cleaned all brass 
and copper antiquities in his shop in this manner.


William Alford

GI Motility Medical Research Page
http://alford.grimtrojan.com/ 

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