frank.logullo wrote:
"Jerry Avins" wrote in message
...
mm wrote:

Dried-on starch just peels off if the Teflon doesn't have microscratches
from dishwasher-detergent grit (I always wash mine by hand.) Teflon is a
brand name. The stuff on utensils is modified, not pure PTFE
(polytetrafluoroethylene), but it's called Teflon anyway. (Pure PTFE
sticks to nothing, not even utensils.) Most things come off a Teflon pan
more easily than they'll come off most other surfaces. It's hard to
clean because it it's hard to deal with a thin film that does stick.

I don't think DuPont has lost the Teflon trademark as they did nylon and
neoprene.

I didn't know they lost those. In the 50s, "nylon" was Israeli slang for
what people now call "cool".

They do sell TFE copolymers marked as Teflon. I think pure PTFE is used in
the cookware finishes but other materials are added for adhesion to the
metal and toughening. DuPont is pretty picky about composition and use of
their finishes but there are other producers that are not. I suspect in OP
original question that there was another transient finish on the sheet.

Pure PTFE is white.

Jerry
--
Engineering is the art of making what you want from things you can get.
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