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.
>
[Non-text portions of this message have been removed]