Fromphyl Posted March 10, 2023 Report Share Posted March 10, 2023 Is there anyway I can smooth this rim? It happened to a few of these mugs. Will sanding take the glaze off? It has like a chippy/bumpy texture. I’m thinking maybe I applied the clear glaze too thick on the rim? I used 3 coats of Amaco velvet underglaze and 3 coats of Amaco HF 9 clear zinc free glaze. Fired to cone 6. Thanks!!! Quote Link to comment Share on other sites More sharing options...
Kelly in AK Posted March 10, 2023 Report Share Posted March 10, 2023 Looks a little bubbly. Try and crunch those with your fingernail and if they pop you’ll have more insight into your problem. My off the cuff guess for a fix is sanding, followed by reglazing the area and a refire. Callie Beller Diesel and Rae Reich 2 Quote Link to comment Share on other sites More sharing options...
Min Posted March 10, 2023 Report Share Posted March 10, 2023 (edited) How many coats of underglaze did you put on and did you allow each coat to dry before the next? Also, how thick was the underglaze when you used it? Underglaze can lift and bubble up if applied too thickly, looks like what might be going on with your mug rim in that area. Edited March 10, 2023 by Min misread post Quote Link to comment Share on other sites More sharing options...
Hulk Posted March 10, 2023 Report Share Posted March 10, 2023 Just curious, how were the the coats of underglaze and glaze applied? Looks like the clear glaze beaded up in the portion between noon and 2:30 o'clock in the image. Was the glaze good around the rest of the rim? Quote Link to comment Share on other sites More sharing options...
Fromphyl Posted March 10, 2023 Author Report Share Posted March 10, 2023 Yeah i think it was the clear glaze as well. @Hulk the rest of the rim is okay and it happened on maybe 3/4 out of 10 cups. I’m gonna try to sand it then reglaze it again and just do two layers of clear. I’ve seen must ppl say they only do 2 layers of clear instead of 3. Rae Reich 1 Quote Link to comment Share on other sites More sharing options...
Hulk Posted March 10, 2023 Report Share Posted March 10, 2023 Any chance there was something on the underglaze that caused the clear glaze to crawl (e.g. fingerprints) and/or the underglaze burnished by contact with something? If you are dipping the mugs into clear glaze, the rim area could get a thicker layer of glaze. I'm typically going for a thicker layer of liner glaze at the rim, for that's the portion that thins the most during firing. I'll pour in, pour out, wait a bit, then dip just the rim for more thickness. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.