Winding Varnish ???

Google enameled copper wire.

You should buy the required type of "Magnet Wire"

Enamelled, Single Cotton Covered, Double Cotton Covered and various grades of those and many others.

Try this link and 2 million others at google > Magnet wire

Google is your friend.

The name GLYPTAL comes to mind, used to be a GE subsidary until 1985. They specialized in insulating coatings. You might talk to people in the motor rewinding business. Check the Yellow pages for a local shop ! they might supply you with 8 oz. from a 5 Gal. Drum !

Yukio YANO

Most people buy the copper pre-coated. there are a number of different coatings in use I have no idea what the formulation of any of them is.

when making connections I have noticed that some need to be scrubbed off with fine sandpaper or steel wool while others will float off if you apply a slightly loaded solering iron to the end of the wire.

I have also seen some windings have been impregnated with some sort of varnish-like resin but I don't think that's what you're after, if you are ask a motor rewinder.

Bye. Jasen

Many (many!) years ago, I worked at a transformer company where we dipped hot transformer assemblies (heated in an oven) into Formvar. The Formvar would seep between the hot laminations of the transformer and cause them to be insulated from one another. That's why commercial transformer look like they've been dipped in varnish. It's still available. Google on Formvar.

Once the transformers had cooled in the Formvar bath, they were then baked again to cure the Formvar.

I should follow up on what I said above. I seem to recall that there was a vacuum process somewhere along the line. If I had to guess, I would guess that it was done after dipping the transformer into the Formvar and before rebaking.

Someone who's still in the transformer business might want to correct me.

Find a local electric motor rewinding shop. The varnish they use is special - it insulates electrically AND it binds the wires into a mass so they don't vibrate. Typically, they use several coats, and it is baked between coats.

--

--------------------------------------------------------------------- DataGet® & PocketLog®

--------------------------------------------------------------------

If you're using at room temp, use airplane dope for the varnish. Maybe it's not available anymore, but it was used to coat the tissue paper skin of model airplanes.

For small coils, I use clear nail polish. I get funny looks when I buy a few at a cosmetics counter ;-)

Al

Thanks you all for participating with your answers . You have all been very helpful . Thanks , Rick