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How hot does a ^5.5 Orton pyrometric cone have to get to melt? I fired the kiln, I thought, to 1201 Celsius. This is a problem. 

Anybody know where to find a kiln tech in China?

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16 hours ago, neilestrick said:

Are you sure that was a 5.5? That cone would melt out white, not black. I think you had a low fire cone, which will melt to black, and would also explain why it puddled at 1201C.

I'm fairly certain it was a 5.5, but there is a chance that it could have been an 05. Would that be enough of a difference to melt it? 

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3 hours ago, tjbanjo said:

I'm fairly certain it was a 5.5, but there is a chance that it could have been an 05. Would that be enough of a difference to melt it? 

yes that as a low fire cone

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Mystery solved! 

As you can see in the image below, the bag is labeled for cone 5.5 cones, while the actual cones in the bag are 05.5 That's kind of a big difference.

I wasn't wearing my reading glasses and just looked at the package when I got the cones out instead of looking at the cones themselves. So, somebody doing the packaging messed up. I wonder how many other bags of these got packaged incorrectly? I suppose I should wear my glasses more. I discovered what happened because I was wearing my glasses today while putting things in the kiln. Ah, the joys of getting older.

Now to get some new cones. Unfortunately, I can't just run to the nearest ceramics supply store and pick some up, since there are no supply stores within a day's drive of me. I'll have to order them. Oh, well, at least now I know.

Bob

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7 hours ago, neilestrick said:

Mystery solved! As another one who needs reading glasses, I can understand how that could happen. Just remember that only low fire cones are brick red.

This is the first I've ever used cones, so I was unaware that there were different colors for different levels. Live and learn.

Bob

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