Fw: [Amps] Transformer varnish removal

[Mike Sawyer]

Before trying any of the below listed solvents, I would think about the
following: All are extremely volatile substances, (with the exception of
Methylene Chloride!), when isopropanol burns, you CANNOT see the flame.
Methylene Chloride is a known carcinogen! MEK, and Toluene are on the
suspect list. I would avoid mixing any of these solvents with each other or
any other substance unless you are SURE of the results. I work in a chemical
manufacturing facility and read the MSDS's on all of these. They will ruin
your life if you don't know what is going on.
Mike(y)
W3SLK
----- Original Message ----- 
From: <ka1xo at juno.com>
To: <Undisclosed-recipients:>
Cc: <amps at contesting.com>
Sent: Thursday, January 15, 2004 12:58 AM
Subject: [Amps] Transformer varnish removal



At Home Cheapo you will find gallon cans of Methyl Ethyl Ketone, quart cans
of Acetone,  of Toluol or Toluene, and of isopropyl alcohol.

Try not to smoke, and don't do this in the kitchen or basement with the
furnace or gas-fired water heater running.

The mixture of the above chemicals with MEK as the base and
Toluol 20%, Acetone 20%, Toluol 10% and alcohol 5% will make a particularly
aggressive removing compound solvent for resinate
deposits including varnishes and polyurethanes.

The mix will not heat up by itself unless you add water. Please avoid adding
water. As long as you keep the mixture in a tightly sealed metal can in a
very cool location like the basement floor it will keep for
months.

Soak articles to be stripped in a covered enamel or stainless soak pan until
the varnish, lacquer or poly has leached out into the solvent, and then use
a parts brush with some clean solvent to finish up the tough spots.

Paste type stripping compounds employ Methyl Chloride. Compared to the stuff
listed above it's in a world of Haz-Mat all by itself. A definite order of
magnitude nastier, by far, but it does work. If you end up using Strip-Eze,
make sure you have a fan going nearby to blow the heavier-than-air cloud of
vapors away from your work station and wear Nalgene or acid-resistant
gloves. MC will burn your skin, but not right away. That's the nasty part.

Hal Mandel
KA1XO


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