Cone 020 temperature
Orton cone 020 bends at 1159 °F (626 °C) at 108 °F/hr and 1231 °F (666 °C) at 270 °F/hr. It sits in the decorating fire range — cone 3 of 38 on the chart, counting up from 022.
108 °F/hr · 60 °C/hr
1159 °F626 °C
Medium — the rate most charts quote
270 °F/hr · 150 °C/hr
1231 °F666 °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 1159 °F is not the same as firing to cone 020 — put a witness cone on the shelf.
What cone 020 is used for
Decorating fire — The lowest cones — used for overglaze work fired onto already-glazed ware: lusters, china paints, and decals. Too cool to mature clay or glaze.
Cone 020 compared
| Comparison | At 108 °F/hr | Difference (medium) | Difference (fast) | |
|---|---|---|---|---|
| cone 020 vs cone 021 | 1112 → 1159 °F | 47 °F (26 °C) | 42 °F (23 °C) | cone 020 is hotter |
| cone 020 vs cone 019 | 1159 → 1252 °F | 93 °F (52 °C) | 52 °F (29 °C) | cone 019 is hotter |
| cone 020 vs cone 06 | 1159 → 1828 °F | 669 °F (372 °C) | 624 °F (347 °C) | cone 06 is hotter |
| cone 020 vs cone 04 | 1159 → 1945 °F | 786 °F (437 °C) | 740 °F (411 °C) | cone 04 is hotter |
| cone 020 vs cone 5 | 1159 → 2167 °F | 1008 °F (560 °C) | 974 °F (541 °C) | cone 5 is hotter |
| cone 020 vs cone 6 | 1159 → 2232 °F | 1073 °F (596 °C) | 1038 °F (577 °C) | cone 6 is hotter |
| cone 020 vs cone 10 | 1159 → 2345 °F | 1186 °F (659 °C) | 1150 °F (639 °C) | cone 10 is hotter |
Convert
cone 020 bends at
1159 °F(626 °C)
At 108 °F/hr (60 °C/hr) — medium. Faster firing → the same cone bends hotter. Everything about cone 020 →
Questions
- What temperature is cone 020?
- Orton cone 020 bends at about 1159 °F (626 °C) when the kiln climbs at 108 °F per hour, and about 1231 °F (666 °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 020 in Celsius?
- 626 °C at 108 °F/hr (60 °C/hr) and 666 °C at 270 °F/hr (150 °C/hr), converted from Orton's Fahrenheit chart for self-supporting regular cones.
- What is cone 020 used for?
- cone 020 sits in the decorating fire range. The lowest cones — used for overglaze work fired onto already-glazed ware: lusters, china paints, and decals. Too cool to mature clay or glaze.
- How far is cone 020 from cone 021 and cone 019?
- At 108 °F/hr, cone 021 bends 47 °F cooler (1112 °F) and cone 019 bends 93 °F hotter (1252 °F). One cone step is not a fixed number of degrees — the spacing varies across the chart.
Firing to cone 020? Claybench schedules the kiln around it.
Clay body, glazes, and firing schedule are matched by cone before a plan is saved.