Cone 11 temperature
Orton cone 11 bends at 2361 °F (1294 °C) at 108 °F/hr and 2399 °F (1315 °C) at 270 °F/hr. It sits in the above studio range range — cone 35 of 38 on the chart, counting up from 022.
108 °F/hr · 60 °C/hr
2361 °F1294 °C
Medium — the rate most charts quote
270 °F/hr · 150 °C/hr
2399 °F1315 °C
Fast — typical of a quick electric firing
Orton self-supporting regular cones; rate measured over the last 200 °F of the firing. Source: Orton °F chart; °C converted. Cones measure heat-work, so a controller set to 2361 °F is not the same as firing to cone 11 — put a witness cone on the shelf.
Cone 11 is not cone 011
Cone 011 — with the leading zero — is 754 °F cooler (1607 °F), in the low fire range. Read the zero as “oh”; a glaze labeled for one will not behave at the other.
What cone 11 is used for
Above studio range — Hotter than nearly all studio work. Used for some porcelains, refractories, and industrial ceramics; most studio kilns are not rated for it.
Cone 11 compared
| Comparison | At 108 °F/hr | Difference (medium) | Difference (fast) | |
|---|---|---|---|---|
| cone 11 vs cone 011 | 1607 → 2361 °F | 754 °F (419 °C) | 758 °F (421 °C) | cone 11 is hotter |
| cone 11 vs cone 10 | 2345 → 2361 °F | 16 °F (9 °C) | 18 °F (10 °C) | cone 11 is hotter |
| cone 11 vs cone 12 | 2361 → 2383 °F | 22 °F (12 °C) | 20 °F (11 °C) | cone 12 is hotter |
| cone 11 vs cone 06 | 1828 → 2361 °F | 533 °F (296 °C) | 544 °F (302 °C) | cone 11 is hotter |
| cone 11 vs cone 04 | 1945 → 2361 °F | 416 °F (231 °C) | 428 °F (238 °C) | cone 11 is hotter |
| cone 11 vs cone 5 | 2167 → 2361 °F | 194 °F (108 °C) | 194 °F (108 °C) | cone 11 is hotter |
| cone 11 vs cone 6 | 2232 → 2361 °F | 129 °F (72 °C) | 130 °F (72 °C) | cone 11 is hotter |
Convert
cone 11 bends at
2361 °F(1294 °C)
At 108 °F/hr (60 °C/hr) — medium. Faster firing → the same cone bends hotter. Everything about cone 11 →
Questions
- What temperature is cone 11?
- Orton cone 11 bends at about 2361 °F (1294 °C) when the kiln climbs at 108 °F per hour, and about 2399 °F (1315 °C) at 270 °F per hour. Cones measure heat-work — temperature over time — so the faster you fire, the hotter the kiln has to get for the same cone to bend.
- What is cone 11 in Celsius?
- 1294 °C at 108 °F/hr (60 °C/hr) and 1315 °C at 270 °F/hr (150 °C/hr), converted from Orton's Fahrenheit chart for self-supporting regular cones.
- Is cone 11 the same as cone 011?
- No — and this is the most common cone mix-up. Cones with a leading zero count down toward cone 1, so cone 011 is cooler than cone 11: about 1607 °F versus 2361 °F at 108 °F/hr, a difference of 754 °F. Read the zero as "oh", not as nothing.
- What is cone 11 used for?
- cone 11 sits in the above studio range range. Hotter than nearly all studio work. Used for some porcelains, refractories, and industrial ceramics; most studio kilns are not rated for it.
- How far is cone 11 from cone 10 and cone 12?
- At 108 °F/hr, cone 10 bends 16 °F cooler (2345 °F) and cone 12 bends 22 °F hotter (2383 °F). One cone step is not a fixed number of degrees — the spacing varies across the chart.
Firing to cone 11? Claybench schedules the kiln around it.
Clay body, glazes, and firing schedule are matched by cone before a plan is saved.