Clay glossary

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Majolica In modern pottery, a soft opaque coloured glaze, firing temperature approx. 900

Model The original or prototype of the piece to be made. Usually in clay, occasionally in plaster.

Modulus of Elasticity The term defining the extent to which a material may be distorted under a given stress. Important in calculating glaze/body relationships.

Modulus of Rupture The resistance offered by a piece of ceramic of unit cross sectional area to a force. The mechanical strength is quoted as modulus of rupture.

Moisture Expansion The extent to which a porous ceramic material will expand in size when it absorbs water or water vapour.

Muffle Kiln A chamber or box built in a furnace and used to fire articles out of direct contact with flames or the products of combustion.