IJS Posted December 25, 2017 Report Share Posted December 25, 2017 Hello and merry Christmas everybody ! :-) I hope someone can help with the following issue. I just fired some porcelain beads, which I glazed on the outside and left nake on the inside, as I put them on a rack in the kiln. After wearing one of them for just one day on a rose gold chain, I noticed that the unglazed inner part of the bead got heavily stained. Do you think that glazing the inside would solve the problem? If so, how could I prevent the piece from sticking to the wire? Thank you :-) Fran Link to comment Share on other sites More sharing options...
LeeU Posted December 25, 2017 Report Share Posted December 25, 2017 Maybe Amaco's Velvet Underglaze or an engobe would help-it shouldn't stick to a rack rod-(test). I know nothing of the chemistry between porcelain and metal chain. Link to comment Share on other sites More sharing options...
IJS Posted December 25, 2017 Author Report Share Posted December 25, 2017 Thank you, I'll try Link to comment Share on other sites More sharing options...
Mark C. Posted December 25, 2017 Report Share Posted December 25, 2017 My guess is your clay is not vitrified-meaning not fired to whatever its rated to.Hence its soft and taking on whatever rubs on it. Are you firing it to its rated temp? As to glazing the inside -thats not going to happen on a wire rack. Give us the details on the clay body firing range and what temp you are taking it to. Link to comment Share on other sites More sharing options...
IJS Posted December 25, 2017 Author Report Share Posted December 25, 2017 37 minutes ago, Mark C. said: My guess is your clay is not vitrified-meaning not fired to whatever its rated to.Hence its soft and taking on whatever rubs on it. Are you firing it to its rated temp? As to glazing the inside -thats not going to happen on a wire rack. Give us the details on the clay body firing range and what temp you are taking it to. I think you nailed it! I'm using Southern Ice and I fired it a bit lower than its rated temperature. I'll try again soon at its max temp. Gonna keep you updated...thank you! Link to comment Share on other sites More sharing options...
neilestrick Posted December 26, 2017 Report Share Posted December 26, 2017 I think any unglazed fired clay is going to have the metal rub off, regardless of how high it's fired. Raw clay is abrasive. I would make the hole smaller so you can't see it. Link to comment Share on other sites More sharing options...
IJS Posted December 26, 2017 Author Report Share Posted December 26, 2017 4 hours ago, neilestrick said: I think any unglazed fired clay is going to have the metal rub off, regardless of how high it's fired. Raw clay is abrasive. I would make the hole smaller so you can't see it. This too sounds likely, alas...still I have to keep that hole size the same Link to comment Share on other sites More sharing options...
Mark C. Posted December 26, 2017 Report Share Posted December 26, 2017 How about a metal sleeve that fits the hole for the chain to slide thru?(gold or silver) Link to comment Share on other sites More sharing options...
Rae Reich Posted December 29, 2017 Report Share Posted December 29, 2017 On 12/26/2017 at 9:19 AM, Mark C. said: How about a metal sleeve that fits the hole for the chain to slide thru?(gold or silver) This is a better idea if you must run a chain through a bead. The roughness of even smoothest porcelain is abrading the metal from the chain and could eventually remove quite a bit of a soft material like gold. What looks like a stain is rubbed-off gold. Link to comment Share on other sites More sharing options...
LeeU Posted December 30, 2017 Report Share Posted December 30, 2017 So-sounds like a sleeve--or good quality cord or leather is the way to go. I am doing porcelain beads and pendants but haven't decided on the neck hanger material yet. A sleeve probably looks great, more classy, but sounds like a "pain" to do/fit properly.) Hope to see pics! Link to comment Share on other sites More sharing options...
Mark C. Posted December 31, 2017 Report Share Posted December 31, 2017 you could use a brass tube and flair the ends to look it into place after sizing it to inside of bead. Link to comment Share on other sites More sharing options...
IJS Posted December 31, 2017 Author Report Share Posted December 31, 2017 Thank you all. The sleeve/tube is a smart idea, but I'm afraid it'd change the aesthetics of the bead. Link to comment Share on other sites More sharing options...
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