Ceramics

2. The dispersion of clay slip or glaze by the addition of an alkaline electrolyte e.g. sodium silicate, Dispex, etc.
4. Forming pottery by pouring slip into a porous mould, usually made from potters plaster.
5. Fired but not yet glazed ware.
8. Non-crystalline, having no determinable form or crystalline structure, e.g. glass.
12. The application of a glaze by immersion and then allowing the excess to drain off.
15. A suspension of extremely fine charged particles in a liquid.
16. A white or coloured coating of slip applied to the clay, for decoration, before glazing.
19. A coating of refractory material applied to saggars, kiln furniture, etc, to prevent sticking during firing.
20. Colourant used to colour clay body.
21. A network of cracks in the glaze caused by tensile stresses greater than the glaze is able to withstand. These may result from mis-match of the glaze with the body.
22. A growth on the surface of ware due to the presence in the body of soluble salts.
24. The crystallization of a vitreous material.
25. The aggregation of suspended particles by the addition of electrolytes to give a proper consistency for casting, dipping, etc.. A flocculant is a thickener.

1. The pre-firing of a ceramic material to remove all moisture and burn off any oxides and gases.
3. The process of forcing clay through an aperture or die. e.g. through a pugmill.
6. A moderately porous pottery body that is fired to a temperature somewhat below that required to produce a vitreous article. Typically 1060 to 1100 C
7. Cracks or cracking in the clay caused by the too rapid cooling or heating of ware, and due to thermal stresses set up in the body.
9. A fusible vitreous coating, fired at low temperatures, for clay articles.
10. The removal of the seam left by the mould in greenware, by fettling knife and/or sponge.
11. These are materials added to a system to give it rigidity or increase its volume. Flint or quartz are often referred to as fillers in ceramic bodies.
13. The separation of clusters of particles into their original separate units i.e. grinding.
14. Name given to prepared clays.
17. Polishing leather hard clay by rubbing with a smooth stone or back of a spoon etc.
18. The property of a suspension such that when it becomes mechanically disturbed it appears to stiffen but becomes mobile again when the disturbing force is removed.
23. Movement of glaze over the body surface during the gloss firing stage, due to dust or grease on the surface or over application of the glaze or excessive colloidal material in the glaze.