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Orton Pyrometric Cones |
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Orton Pyrometric ConesPyrometric cones are useful in determining when a firing is complete, if the kiln provided enough heat, if there was a temperature difference in the kiln or if a problem occurred during firing. Cones are made from carefully controlled compositions and they bend in a repeatable manner (over a relatively small temperature range- less than 40ºF). Small (junior) cones are used in a Kiln-Sitter™. |
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SSB Self-Supporting Cones "Witness Cones"
Orton
Self-Supporting cones box of 25
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SSB Mid-Range Assortment Pack Assortment includes 6 of each - Cone 4, 5, and 6 $9.99 |
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SSB Low Fire Assortment Pack Assortment includes 6 of each - Cone 04, 05, and 06 $9.99 |
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LRB Large Standard Pyrometric Cones Orton LRB large Standard cones are $15.36 for a box of 50 |
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SRB Small Cones "Junior Cones" 1 1/8" (2.86 CM) Tall. Small
cones are commonly used in the kiln sitter. The tapered shape allows
some flexibility to adjust the shut-off temperature by placing the
thinner or thicker portion of the cone under the sensing rod. Small
cones can also be used as miniature witness cones when space is limited.
Support Plaque Shown Below $.99 Each Orton Junior cones are $11.32 for a box of 50 |
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Pyrometric Bars Pyrometric Bars are 1 inch (2.54 cm) Long. The uniform shape allows for more consistent control when used in Kiln-Sitter.
Orton PYROMETRIC BARS are $12.56 for a box of 50 |
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Orton LRB cones support plaque - 4 CONE $2.25 each |
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Orton LRB coneS support plaque - 3 Cone $1.99 each |
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Orton Small Regular bar cones $2.25 each |
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Orton CONE BENDING CHART Pocket sized measuring template for Orton large and self-supporting cones. Temperature equivalents are on the back in Fahrenheit. Great for measuring the bending angle of a fired cone. $2.98 each |
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Pyrometric Cones for Ceramic ArtsPyrometric cones measure heat-work (the effect of time and temperature). Pyrometric cones are slender pyramids made from about 100 carefully controlled compositions. Each cone number is unique in measuring temperature within a small temperature range (less than 30°C). Cones measure the amount of heat absorbed. As the cone nears its maturing range, it softens and the tip begins to bend, drawn down by the influence of gravity
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Pyrometric Bars are 1
inch (2.54 cm) Long. The uniform shape allows for more consistent
control when used in Kiln-Sitter. Temperature Equivalents use the same numbering system as small cones. View Temperature Equivalents in either Degrees C or Degrees F chart. |
Cone/Temperature Conversion Chart | ||||
Cone | Temp at 108ºF/hr | Temp at 270ºF/hr |
Kiln Color |
Ware and Glaze Types |
10 | 2345 | 2381 | White | Stoneware Glaze |
9 | 2300 | 2336 | ||
8 | 2280 | 2320 | ||
7 | 2262 | 2295 | ||
6 | 2232 | 2269 | Porcelain Bisque | |
5 | 2167 | 2205 | ||
4 | 2124 | 2161 | Porcelain Glaze | |
3 | 2106 | 2138 | ||
2 | 2088 | 2127 | ||
1 | 2079 | 2109 | ||
01 | 2046 | 2080 | Yellow | |
02 | 2016 | 2052 | ||
03 | 1987 | 2019 | ||
04 | 1945 | 1971 | ||
05 | 1888 | 1911 | ||
06 | 1828 | 1855 | Bisque,Low Glaze | |
07 | 1789 | 1809 | Orange | Red Family Glazes |
08 | 1728 | 1753 | ||
09 | 1688 | 1706 | ||
010 | 1657 | 1679 | ||
011 | 1607 | 1641 | ||
012 | 1582 | 1620 | ||
013 | 1539 | 1582 | Red | |
014 | 1485 | 1540 | ||
015 | 1456 | 1504 | ||
016 | 1422 | 1465 | ||
017 | 1360 | 1405 | Glass Sagging | |
018 | 1319 | 1353 | China Paints | |
019 | 1252 | 1283 | Metallics, Lusters | |
020 | 1159 | 1180 | Dull Red | Decals |
021 | 1112 | 1143 | Glass Paint | |
022 | 1087 | 1094 | ||
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