Homebrew PCBs

Steve:

Is it the methanol additive doing that?  My experience is that it will actually smear clear polystyrene windows like you describe (and stick the fuzz particles to it).  I was pretty sure pure ethanol was doing it too, but now I am questioning that. 
 
  ----- Original Message ----- 
  From: Steve 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Tuesday, November 28, 2006 8:11 PM
  Subject: [Homebrew_PCBs] Re: Isopropyl Alcohol 90%


  --- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
  <stefan_trethan@...> wrote:
  >
  > On Tue, 28 Nov 2006 01:32:54 +0100, AnaLog Services, Inc. 
  > <wireline@...> wrote:
  > 
  > > One caution: ethanol will attack some of the nastier plastics like 
  > > styrene; it does not bother typical PCB material at all.
  > 
  > 
  > I've yet to observe ethanol attack styrene, but maybe the additives
  are 
  > different in some places for denatured. I use mine on all plastics
  with no 
  > hesitation.

  Denatured alcohol has methyl alcohol added, and denatured -does-
  attack styrene, albiet very slowly. Most VCR front panels are/were
  made of styrene. IPA wipes crayon off of it very well, denatured works
  even better but you'll end up with bits of fluff from your rag welded
  into the top layer of plastic.

  Now things are made of different kinds of plastic, usually painted.

  Steve Greenfield



   

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