Pyrometric Cones (Orton Standard)
Temperature Equivalent Chart
(when heated at 150oC/hr*)
Warning! Do not view cones above earthenware
temperature with the naked eye as this may cause cataracts. View through
welders goggles - sunglasses are not suitable as they filter out UV,
but not the infra-red, which is the damaging wavelength in this case!
| Cone No. |
Centigrade |
Fahrenheit |
Visual Color |
| 022 |
600 |
1112 |
Dull Red |
| 021 |
614 |
1137 |
|
| 020 |
635 |
1175 |
|
| 019 |
683 |
1261 |
|
| 018 |
717 |
1322 |
|
| 017 |
747 |
1376 |
|
| 016 |
792 |
1457 |
|
| 015 |
804 |
1479 |
|
| 014 |
838 |
1540 |
|
| 013 |
852 |
1565 |
|
| 012 |
884 |
1623 |
Cherry Red |
| 011 |
894 |
1641 |
|
| 010 |
900 |
1652 |
|
| 09 |
923 |
1693 |
|
| 08 |
955 |
1751 |
Orange |
| 07 |
984 |
1803 |
|
| 06 |
999 |
1830 |
|
| 05 |
1046 |
1914 |
|
| 04 |
1060 |
1940 |
|
| 031/2 |
1080 |
1976 |
|
| 03 |
1101 |
2014 |
|
| 02 |
1120 |
2048 |
|
| 01 |
1137 |
2079 |
|
| 1 |
1154 |
2109 |
Yellow |
| 2 |
1162 |
2124 |
|
| 3 |
1168 |
2134 |
|
| 4 |
1186 |
2167 |
|
| 5 |
1196 |
2185 |
|
| 6 |
1222 |
2232 |
|
| 7 |
1240 |
2264 |
|
| 8 |
1263 |
2305 |
|
| 9 |
1280 |
2336 |
|
| 10 |
1305 |
2381 |
White |
| 11 |
1315 |
2399 |
|
| 12 |
1326 |
2419 |
|
| 13 |
1346 |
2455 |
|
