Homebrew PCBs

It is now clear that PGA (Everclear) ethyl alcohol (ethanol) only very mildly attacks polystyrene.  It does not noticeably attack ABS, but is listed as very mildly aggressive.  My PGA test on my paper towel dispenser showed no noticeable effect.  My confusion stemmed from what is in denatured ethyl alcohol.  It is denatured with a variety of crap, some of which will attack ABS.

  ----- Original Message ----- 
  From: Herbert E. Plett 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Wednesday, November 29, 2006 10:53 PM
  Subject: Re: [Homebrew_PCBs] Isopropyl Alcohol 90%



  --- "Syd H. Levine" <wireline@...> wrote:
  > ... My paper towel 
  > dispensers in the shop are polystyrene, and if my fingers are wet with 
  > ethanol, they will stick to the darn things and leave fingerprint marks.

  usually they are ABS...
  styropor (or whatever brand) is 'pure' foamed styrene. is this attacked?

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