What glaze we can use on air dry clay, pls. Thank you.

Here you go, a couple options!

http://www.theclayteacher.com/finishing_tips.html

http://m.wikihow.com/Color-Air-Dry-Clay

maybe Glossy ModPodge that is dishwasher safe; what is the composition of the clay? also a good product is Rustoleum spray poly -what does the mfg of the clay say about protective coatings-

http://www.gatheringbeauty.com/2015/03/how-to-make-your-own-diy-glaze-for-clay-crafts.html?m=1

Try Krylon High Gloss spray on a small test area. Works on most of my projects

Acrylic paint

You can use clear varnish spray or believe it or not hairspray works great for clay. Cheaper and hardens quick, buy super hold. Your work in the pictures is beautiful.

Only use a triple thick clear gloss. Your beautiful work needs the extra strength of the triple thick.

i also use Modge Podge. You may choose either a Gloss or Matte finish and I try not to water it down but use it straight from the bottle and I let the clay fully dry before applying the finish.

I would use clear nail polish on something small since I already have it.

Check out Laurie Mika.

If it's air dry or oven bake, but not meant to be food safe or going to get wet, Modge Podge in Matte or Gloss works. So does Elmer's Glue. You can even tint the glue with tissue paper if you like. Just don't add water to either and use thin coats.

I'd recommend Sculpey's glaze (they have glossy and matte).