mergedfile - de la warr pavilion · appendix ii stages of clay material samples for fantômas 1....
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Appendix II
Stages of Clay Material samples for Fantômas
1. Plastic Clay
Soft and malleable. The clay can be moulded into any form. At this stage Caroline Achaintre
would impress textures, shape and cut the clay.
2. Leather Hard
The clay has firmed up but is still not dry. It feels cool to the touch. At this stage slip (liquid
clay) decoration could be added.
3. Greenware
Now the clay is dry. It no longer feels cool to the touch. It is ready to be fired in a kiln. Great
care has to be taken with Greenware as it is easily damaged.
4. Bisqueware
Bisqueware has had its first firing (typically to 900 degrees centigrade). The clay has
chemically changed now and can no longer revert back to plastic clay if water is added.
Bisqueware is porous. Wet glaze suspensions can be applied to Bisqueware. The porosity of
the Bisqueware helps the wet glaze to adhere to the surface and is like a powder coating
once dry.
5. Stoneware
The high stoneware firing (typically to 1260 degrees centigrade) matures the clay body and
the glaze. Chemicals added to the glaze can produce different colours and effects. Different
firing conditions (like oxidizing and reduction) can affect the glaze colours too. Caroline
Achaintre uses lots of different glazes. Some are glossy, some are matte. Notice also how
much smaller the Stoneware sample is to the Leather Hard sample.