Cone 6

[Kristy Purton]

Hello, I have cone 6 stoneware clay, I was gifted a kiln with cones but there are different size cones all labelled 6 how do I know which one to use for the type of clay I have?

[liambesaw]

I think the brown ones are cone 06

[Dick White]

Further to what liambesaw said, cone 06 and cone 6 are not the same. There is about 400F difference between them. Cone 06, the brown ones, are typically use for bisque or earthenware glazes, while cone 6 is for mid-fire glazes. Most of the ones you were given are very old (but still good) as they are packed in vermiculite. Also, the cone 6 ones are white, now they are pink. The ones in the box in the lower right corner of your picture are self-supporting bisque cones, which will stand up by themselves on the kiln shelf where you can look through a spy peep (while wearing appropriate eye protection) to see when the cone has bent. The others are mini-cones used in the kiln sitter.

[Bill Kielb]

1 hour ago, Dick White said:

Further to what liambesaw said, cone 06 and cone 6 are not the same. There is about 400F difference between them. Cone 06, the brown ones, are typically use for bisque or earthenware glazes, while cone 6 is for mid-fire glazes. Most of the ones you were given are very old (but still good) as they are packed in vermiculite. Also, the cone 6 ones are white, now they are pink. The ones in the box in the lower right corner of your picture are self-supporting bisque cones, which will stand up by themselves on the kiln shelf where you can look through a spy peep (while wearing appropriate eye protection) to see when the cone has bent. The others are mini-cones used in the kiln sitter.

@Kristy Purton

Not to make everyone paranoid......

The asbestos often found in vermiculite is considered very dangerous. Familiarize yourself with the safe handling of this packing material and a suitable way to dispose of it.