Painting on glass - BIG problem!

I'm trying to find a tecnique of glass painting (on beerglasses) that
will stand up to the rigors of being handled. The first attempt was
done using solvent- based glass paint. All seemed ok to start with,
but after a while the paint began literally sliding off the glass as
it was handled. Maybe this was due to poor preparation of the surface,
or was it the wrong kind of paint? The paint was simple air- drying
and was not fired. Anyone know what I'm doing wrong?!! - Martin
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Anyone know what I'm doing wrong?!! - Martin
Yup, your going low end on a high end job. Surface prep and correct materials are the ticket. How many are you making? Consider having them silk-screened, how thick is the glass, how even is the thickness. Most of the commercial advertising people have someone that does this. Check with the local guy that does silk-screening, they have non fire paints/inks made with epoxy base, and run them thru the dryer to "set" the ink.
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Sounds like a beer glass with a built in cut-off-o-meter. Paints gone and you're done buddy! Sorry. One easy choice would be Pebeo Vitrea. You paint on, let dry and bake in a regular home-type oven. I think Deca makes an air-dry paint for glass, but the drying time is something like 2 weeks. Haven't used them, but the Pebeo should work for a while OK. Nothing is going to last forever if it gets much use anyway. Mayco makes a low-fire paint called Images for painting on glass. That must be fired in a kiln. I have tried them, and they are OK. Not the easiest stuff to find, for me anyway. The Pebeo is readily available at art/craft stores. They make 2 kinds I think. One for porcelain, and one for glass.
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Spoke with a mayco representative and they are no longer making the glass paints. I can tell you however that a company called crest molds is making a glass paint for kiln firing that I am having good results with.
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I use a 2-part paint, (epoxy) that is actually a silk-screen ink. Lots of colors, but in quart cans. One mixes paint and catalyst, just enough to last no more than 3 or 4 hours of working time. It stiffens up after that, just like epoxy cement does. Check out silk screen printing suppliers in your area. It can be air-dried in about 2 weeks, or can be heated in an oven following a schedule of degrees and minutes. It doesn't fuse with the glass the way kiln-fired enamels do, but it's pretty darn good -- I decorated a couple of drinking glasses with it for fun (my main work involves painting flat glass) and they are standing up to washing just fine.
The kind I use is: "Nazdar Epoxy Resin Screen Ink" but I'm sure there are other brands.
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Carol Cohen
I guess that explains why I can't find them. Just when I find something that's low fire enough before glass moves. And lead/cadmium free. Figures. Those that Crest sells, the Satelite/Unique paints are very high fire aren't they? Something around 1500 degrees to mature I think I read?
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