Tikiguy Posted May 23, 2014 Report Share Posted May 23, 2014 For the last year all of the mugs I've made, no matter how long they've been around for, make a strange pinging sound. It sounds like someone taping on them with a small metal object. almost like some hitting a chime. We thought it was just long term cooling, but these have been around for 6 months. My kids say it's a ghost tapping on the glasses. You'll be sitting next to the mugs and you'll hear a small soft, "ping....", "Ting....", "Ting, Ting...." Sometimes it sounds like a song when there's a bunch of mugs on the table. Is this just ceramic chemistry or do I need Ghost Adventures??? -Alex Link to comment Share on other sites More sharing options...
Min Posted May 23, 2014 Report Share Posted May 23, 2014 That would be crazing that you hear. Glaze doesn't fit the clay, need to lower the expansion of the glaze. If you do a search using the words coe or coefficient of expansion there are lots of good threads discussing this. Good news is that you don't need a ghost exorcism. Link to comment Share on other sites More sharing options...
flowerdry Posted May 26, 2014 Report Share Posted May 26, 2014 I swear I heard a vessel ping while standing in a museum room full of ancient pottery. Now that was awesome....but kind of creepy too. Link to comment Share on other sites More sharing options...
bciskepottery Posted May 26, 2014 Report Share Posted May 26, 2014 I swear I heard a vessel ping while standing in a museum room full of ancient pottery. Now that was awesome....but kind of creepy too. One can almost imagine the curators sitting in their room behind the displays with a triangle. "Got another one. Hee, hee." Link to comment Share on other sites More sharing options...
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