Homebrew PCBs

Yes, that does appear to be the case.  I just tested PGA on some ABS, and there is no detectable degradation.  The denatured material I have causes marked damage to susceptible plastics.

The denaturing agent is NOT Methanol alone I now see from the federal regulation which states the formulas for Completely Denatured Alcohol.  If it comes from Lowes, Wal-Mart, a paint store, etc., it can only be one of the CDA formulas.  And that means it will have some gasoline or kerosene in it, and possibly a number of other nasty ingredients.  Looking at the formulas for CDA is a real eye-opener!  I will never use the denatured product again for flux cleaning.

This has been an educational experience.  Thank you for making me re-examine something I thought I understood.

Syd H. Levine
AnaLog Services, Inc.
Phone:  270-276-5671
Telefax:  270-276-5588
E-mail:  analog@...
URL:  www.logwell.com
  
  ----- Original Message ----- 
  From: Steve 
  To: Homebrew_PCBs@yahoogroups.com 
  Sent: Wednesday, November 29, 2006 1:30 PM
  Subject: [Homebrew_PCBs] Re: Isopropyl Alcohol 90%


  From what others are saying, I suspect that it's either the methanol,
  or there are some other additives to denature it that mildly eat into
  some plastics.

  Steve Greenfield

  --- In Homebrew_PCBs@yahoogroups.com, "Syd H. Levine" <wireline@...>
  wrote:
  >
  > 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. 
  > 



   

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