Practice question · Sort into groups
Sort each statement by whether it concerns the BISQUE firing or the GLAZE firing.
Groups: Bisque firing · Glaze firing
- Burns out organic material
- Is usually the hotter of the two
- Drives off chemically combined water
- Takes a stoneware body towards vitrification
- Melts a glass layer fused to the body
- Leaves the body porous enough to absorb glaze
Hints
- One firing prepares the body; the other finishes it.
- The hotter firing is the second, not the first.
Show the answer
Bisque firing: Drives off chemically combined water, Leaves the body porous enough to absorb glaze, Burns out organic material
Glaze firing: Melts a glass layer fused to the body, Takes a stoneware body towards vitrification, Is usually the hotter of the two
Why
The two firings have genuinely different jobs, which is why the order of temperatures surprises people. The first makes the body workable-with; the second has to melt glass, and that takes considerably more heat.
Practise Firing
The app has 4 more questions on this lesson, and keeps your place in the course. Sculpture I is free to start.
More questions on Firing
- Why do pyrometric cones remain in use alongside electronic temperature control?
- Which are true of quartz inversion at about 573 degrees?
- The same glaze recipe produces the same colour regardless of kiln atmosphere.
- Complete the account of firing.
- A kiln firing is defined as an entire schedule rather than reaching a single peak temperature. What practical…
- At approximately what temperature, in degrees Celsius, does quartz inversion occur?
- Match each firing atmosphere or concept to what it means.
- Arrange the stages of a firing schedule in order.
- A body bisque-fired too high may fail to absorb glaze properly.