How to seal UV Ink on Ceramic tiles and Glass?

i've run into this a bit. of all things in ended up using varathane (water based clear) in a thicker than usual layer. then lay in the CAB lacquer or UV curable polyurethane (both very hot solvents) thinly in two or three coats. the thinner coats will help the lacquer dry quicker. as far as your epoxy paint, why aren't you using a cab white? is it not certified? the dry time is very very fast if you set it up just right. the quicker the dry time the better chance of it not attacking your seal.

 

you could learn to do it the way its been for years...........CERAMIC GLAZES...it is IMPERVIOUS!!!!!!
this my old friend, now heres a backsplash)))))
http://www.facebook.com/media/set/?set=a.1055137856535.2009194.1168497771

 

the varathane is surprisingly more solvent resistant that you'd figure it should be just coming off the shelf. the only issue with the waterbased clears is they they don't bite the surface when sprayed. i do some adhesion tests with it a bit to figure out if you need to use any adhesion promoter (that is if it works for your product).

also, there are some very high end water based lacquers like sherwin williams chem-aqua. i haven't used it before but the reviews say it is some amazing stuff. almost sprays like nitro'. i'm sure their properties surpass the varathane. the problem is it's only available in 5 gallon pales.

 

We've had good success running our 5'x10' jigs full of 4"x4" ceramic tiles off to an auto body shop for a few coats of Dupont Clear Coat, baked off in the shops IR spray booth/oven. Bonus: if they get a scratch, just buff it out like a car!!