Once Fired Ceramics

Once-fired ceramics is a technique where you fire from the greenware state straight through to the clay's vitrification temperature. There is no separate bisque firing; it is all done at once. The range of temperature depends on the clay and glazes being used. You can once-fire with any kind of clay, though it tends to be more stressful on the clay body. People do it to save time and energy and to achieve certain affects. It is commonly done in more atmospheric firings: wood, salt and soda, however can be done in regular gas or electric kilns as well.

Challenges

The once-fire process poses many challenges to an inexperienced artist.  It requires control of slip shrinkage, adherence, and melting properties in order to avoid problems with crawling and blistering. Do not underestimate the difficulty of getting a once-fire process working well. 

Market

Once fire is popular in industry for everything from table ware to porcelain insulators.

Recommended Kilns

The L&L Flagship Kiln: Six popular Easy-Fire models. Multi-Zone control. Sectional. Easy maintenance. Sizes from 2.5 to 10.2 cubic feet. Most models and voltages are Cone 10.
School-Master kilns are designed specifically for K-12 schools with a Five-Year Warranty. One-touch simple control. Sectional. Graded elements. Cone 6 but with plenty of power for long life.
The ideally sized Fuego Craft Kiln reaches Cone 10 with power to spare on a 240 volt 20 amp circuit. Includes simple One-Touch™ program control.
The perfect hobby kiln with a 12 foot long 30 amp cord for plugging into a dryer outlet. One-Touch Simple Control. Cone 10.
High Power Production version of Easy-Fire Series with "Quad" element design. Multi-Zone Control. Sectional. Easy Maintenance. Sizes From 6.7 To 10.2 Cubic Feet. Cone 10.
Small Kiln for Hobby Use and Glaze Testing. One-Touch or DynaTrol program controls. Various voltages and amp ratings.
Affordable front-loading kilns with professional features like an 4-1/2" K25 arched roof, door elements, cooling vent and 5" of multi-layered insulation. Multi-Zone DynaTrol. Cone 10.
Large Heavy-Duty Front-Loading Kilns. Includes 4-1/2" K25 arched roof, door elements, and 5" of multi-layered insulation. Multi-Zone DynaTrol. Cone 10.
Customizable Automatic Zoned Top-Loading Kilns - up to 45" tall. Multi-Zone control. Sectional with plug in control panel. Easy maintenance. Sizes from 2.6 to 17 cubic feet. Most models and voltages are Cone 10.
Jupiter Kilns that pull apart for easy loading of sculpture
Affordable Square Top Loading Kilns. Multi-Zone Control. Sectional. Easy Maintenance. Sizes From 5 to 11.7 Cubic Feet. Most models and voltages are Cone 10.