Adding depth to encapsulated stains in Clay and Glaze Chemistry Posted May 23 · Report reply 5 hours ago, Magnolia Mud Research said: Doc, Look at Ron Nagle's work. His pieces has lots of color depth. His technique is to spray thin layers of clear glaze over the colored layers fire and add another layer of clear, fire. Some of his pieces have been fired 20-30 times. He learned this approach (or so he said in an interview long ago) from his youth decorating hot-rod automobiles. That is also the approach my painting professor recommended in painting classes. LT I have experimented with a single layer of clear over encapsulated stains and that certainly helps. The idea of repeated firing of thin coats is interesting, but I really don't understand how that would work. I have no experience in refiring pots. I don't understand how you would not just melt both the prior layer and the most recent layer of clear so that it would behave like a thicker original coat. Please explain. I did find some pictures of Ron Nagle's work on the web, but it is hard to appreciate the depth of the glaze from the pictures.