Sentry Industries Sentry 2.0 Appendix D: Temperature Equivalents For Orton Self-Supporting Pyrometric Cones

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Appendix D: Temperature Equivalents
For Orton Self-Supporting Pyrometric Cones
°F
Cone Self-Supporting Cones Pre-Fire
Number Color
Heated at: 27° F 108° F 270° F
Per Hour* Per Hour* Per Hour*
022 — 1087 1094 Green
021 — 1112 1143 Fuschia
020 — 1159 1180 Orange
019 1213 1252 1283 Yellow
018 1267 1319 1353 White
017 1301 1360 1405 Pink
016 1368 1422 1465 Light Blue
015 1382 1456 1504 Violet
014 1395 1485 1540 Gray
013 1485 1539 1582 Green
012 1549 1582 1620 Fuschia
011 1575 1607 1641 Orange
010 1636 1657 1679 Dark Red
09 1665 1688 1706 Dark Red
08 1692 1728 1753 Dark Red
07 1764 1789 1809 Dark Red
06 1798 1828 1855 Dark Red
051/2 1839 1859 1877 Dark Red
05 1870 1888 1911 Dark Red
04 1915 1945 1971 Dark Red
03 1960 1987 2019 Dark Red
02 1972 2016 2052 Dark Red
01 1999 2046 2080 Dark Red
1 2028 2079 2109 Dark Red
2 2034 2088 2127 Dark Red
3 2039 2106 2138 Dark Red
4 2086 2124 2161 Gray
5 2118 2167 2205 Green
51/2 2133 2197 2237 White
6 2165 2232 2269 Fuchsia
7 2194 2262 2295 Orange
8 2212 2280 2320 Yellow
9 2235 2300 2336 White
10 2284 2345 2381 Pink
*Rate of temperature increase during last 90 - 120
minutes of firing. Tables by courtesy of the Edward
Orton, Jr. Ceramic Foundation.
°C
Cone Self-Supporting Cones Pre-Fire
Number Color
Heated at: 15° C 60° C 150° C
Per Hour* Per Hour* Per Hour*
022 — 586 590 Green
021 — 600 617 Fuschia
020 — 626 638 Orange
019 656 678 695 Yellow
018 686 715 734 White
017 705 738 763 Pink
016 742 772 796 Light Blue
015 750 791 818 Violet
014 757 807 838 Gray
013 807 837 861 Green
012 843 861 882 Fuschia
011 857 875 894 Orange
010 891 903 915 Dark Red
09 907 920 930 Dark Red
08 922 942 956 Dark Red
07 962 976 987 Dark Red
06 981 998 1013 Dark Red
051/2 1004 1015 1025 Dark Red
05 1021 1031 1044 Dark Red
04 1046 1063 1077 Dark Red
03 1071 1086 1104 Dark Red
02 1078 1102 1122 Dark Red
01 1093 1119 1138 Dark Red
1 1109 1137 1154 Dark Red
2 1112 1142 1164 Dark Red
3 1115 1152 1170 Dark Red
4 1141 1162 1183 Gray
5 1159 1186 1207 Green
51/2 1167 1203 1225 White
6 1185 1222 1243 Fuchsia
7 1201 1239 1257 Orange
8 1211 1249 1271 Yellow
9 1224 1260 1280 White
10 1251 1285 1305 Pink
*Rate of temperature increase during last 90 - 120
minutes of firing. Tables by courtesy of the Edward
Orton, Jr. Ceramic Foundation.