Cone 05 temperature
Orton cone 05 bends at 1888 °F (1031 °C) at 108 °F/hr and 1911 °F (1044 °C) at 270 °F/hr. It sits in the bisque & earthenware range — cone 19 of 38 on the chart, counting up from 022.
108 °F/hr · 60 °C/hr
1888 °F1031 °C
Medium — the rate most charts quote
270 °F/hr · 150 °C/hr
1911 °F1044 °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 1888 °F is not the same as firing to cone 05 — put a witness cone on the shelf.
Cone 05 is not cone 5
The leading zero means cone 05 counts down from cone 1 — it's a bisque & earthenware temperature (1888 °F). Cone 5 is 279 °F hotter (2167 °F), in the mid fire range.
What cone 05 is used for
Bisque & earthenware — The workhorse range for the first firing. Cone 06 and 04 are the two standard bisque targets, and most earthenware and low-fire glazes mature here too.
Convention per Bartlett factory bisque profiles (cone 08/06/04); Orton.
Cone 05 compared
| Comparison | At 108 °F/hr | Difference (medium) | Difference (fast) | |
|---|---|---|---|---|
| cone 05 vs cone 5 | 1888 → 2167 °F | 279 °F (155 °C) | 294 °F (163 °C) | cone 5 is hotter |
| cone 05 vs cone 05½ | 1859 → 1888 °F | 29 °F (16 °C) | 34 °F (19 °C) | cone 05 is hotter |
| cone 05 vs cone 04 | 1888 → 1945 °F | 57 °F (32 °C) | 60 °F (33 °C) | cone 04 is hotter |
| cone 05 vs cone 06 | 1828 → 1888 °F | 60 °F (33 °C) | 56 °F (31 °C) | cone 05 is hotter |
| cone 05 vs cone 6 | 1888 → 2232 °F | 344 °F (191 °C) | 358 °F (199 °C) | cone 6 is hotter |
| cone 05 vs cone 10 | 1888 → 2345 °F | 457 °F (254 °C) | 470 °F (261 °C) | cone 10 is hotter |
Convert
cone 05 bends at
1888 °F(1031 °C)
At 108 °F/hr (60 °C/hr) — medium. Faster firing → the same cone bends hotter. Everything about cone 05 →
Questions
- What temperature is cone 05?
- Orton cone 05 bends at about 1888 °F (1031 °C) when the kiln climbs at 108 °F per hour, and about 1911 °F (1044 °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 05 in Celsius?
- 1031 °C at 108 °F/hr (60 °C/hr) and 1044 °C at 270 °F/hr (150 °C/hr), converted from Orton's Fahrenheit chart for self-supporting regular cones.
- Is cone 05 the same as cone 5?
- No — and this is the most common cone mix-up. Cones with a leading zero count down toward cone 1, so cone 05 is cooler than cone 5: about 1888 °F versus 2167 °F at 108 °F/hr, a difference of 279 °F. Read the zero as "oh", not as nothing.
- What is cone 05 used for?
- cone 05 sits in the bisque & earthenware range. The workhorse range for the first firing. Cone 06 and 04 are the two standard bisque targets, and most earthenware and low-fire glazes mature here too.
- How far is cone 05 from cone 05½ and cone 04?
- At 108 °F/hr, cone 05½ bends 29 °F cooler (1859 °F) and cone 04 bends 57 °F hotter (1945 °F). One cone step is not a fixed number of degrees — the spacing varies across the chart.
Firing to cone 05? Claybench schedules the kiln around it.
Clay body, glazes, and firing schedule are matched by cone before a plan is saved.