Homebrew PCBs

One point I have never seen touched-on in this group:   Much copper-clad 
(all?) seems to be manufactured with 1/2 oz. copper, as MOST  boards are "plated 
through" after drilling but before resist is applied, and  tin-plated.  Then, 
the copper is "1 oz."  
 
I picked up some ca. 4" wide x 3' waste, double-sided copper,  from a local 
PCB house (they explained anything narrower than 4" just won't work  in their 
plating- and etching machines, so once stock gets that narrow, they  scrap it). 
 It etched MUCH faster than I THOUGHT I had used before, and I  did some 
forensics.  That prompted a call to the PCB house folks, and they  confirmed, they 
buy-in 1/2 oz. stock, as it is less expensive than 1  oz., so saves money, 
etchant, and time.  What about this,  Gang???            Jan  Rowland


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