Natania Posted November 13, 2013 Report Share Posted November 13, 2013 Two cups that I made were returned to a store a month or two after the customer bought them because they developed hairline fractures. The shop owner emailed me asking if it might be a fault with the ware. I can't imagine it would be, they are made out of B-mix 5 and fired to temperature (or slightly higher). I am kind of assuming that they were bumped knocked (human error)....My only other thought is that they are thrown fairly thinly - could it be that washing them in a dishwasher is a bit harsh if they are on the fragile side - not from heat but maybe water spray pressure or something?? I don't actually own a dishwasher, so I don't have any idea what they are like on ceramics, although it seems that the common consensus is that any ware that is vitreous should be dishwasher safe... Any thoughts? Link to comment Share on other sites More sharing options...
Marcia Selsor Posted November 13, 2013 Report Share Posted November 13, 2013 Have you seen them? Are they crazing rather than fracturing? One thing I can imagine is the glaze isn't fitting and the crazing may have shown up after washing the pots. OR as you think, the got knocked. Marcia Link to comment Share on other sites More sharing options...
Mark C. Posted November 13, 2013 Report Share Posted November 13, 2013 This could be from so many factors- The actual dishwasher should not be one of them My guess and it can only be a guess is bumped or made to thin for daily use It could also be a body or glaze issue The pots need to be inspected by you This is where a photo is worth a thousand replys Ceramics makes catch 22 seem like a cake walk. Mark Link to comment Share on other sites More sharing options...
Diane Puckett Posted November 13, 2013 Report Share Posted November 13, 2013 Several months ago I purchased a mug which I used for hundreds of cups of tea. It was repeatedly run through the dishwasher. Last week I poured hot water into it and heard a crack. The mug immediately began weeping from a diagonal crack which runs up the side, neither reaching the top nor the bottom. It looks like dunting, but I am surprised it took so long to appear. Link to comment Share on other sites More sharing options...
GEP Posted November 13, 2013 Report Share Posted November 13, 2013 I agree with Mark, there are lots of possible answers. Do you have a photo? Or can you describe the crack more specifically? Link to comment Share on other sites More sharing options...
Natania Posted November 14, 2013 Author Report Share Posted November 14, 2013 good questions everyone. I didn't see the cracks. Apparently the customer didn't leave the first cup, and dropped the second one on the sidewalk getting out of the car at the shop. So, without more to go on, I am going to assume that this particular customer did something to cause the fractures, unless I hear more similar feedback (which I never have). I don't think it was crazing, because I have a load of the same ware I've been using in my own kitchen for well over 2 years now, and I can tell that the glaze fit is good, and there is no crazing. So, I think it must have been knocking it...or perhaps I threw the cup too thin. I've been concentrating on making the walls a sturdier thickness anyway, so this is a good reminder.....Diane - do you think that your mug cracked because of the boiling water, or because the wall of the cup was think and the water hot as well? -Natania Link to comment Share on other sites More sharing options...
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