An over-glaze printing process using a flexible material to transfer a design from
an engraved plate to the ware
Roast by application of strong heat in order to make some chemical or physical change
to a material. Animal bones were calcined as part of the process of making the bone
ash used as a component of the paste used for bone china.
Calcination is used to remove unwanted volatiles substances from a material or to
convert it to a different state. Materials are ground after calcining ready for addition
to a paste.
Technique of making articles by pouring liquid or molten materials or metals int0
Method of decorating by burning in pigments to earthenware, usually in a brick red,
often on a black stoneware body.
Application of a smooth, impervious, glassy coating to ceramics primarily to make
the body hygienic and non-porous. A glaze may be transparent, translucent or opaque,
white or coloured, and highly glossy to matt in surface texture.
A term relating to the glazing of ceramics. The glost firing is the firing applied
after the glaze material has been applied with the purpose of fusing it to the body
of the ware. Thus, glost house, glost oven etc.
Wares, generally hollow ware, produced by hand on a potter's wheel.
Ato form a decoration by cutting into the surface with a metal tool. See scraffito
A process for forming pottery on a lathe or wheel. A profile describing the outside
shape of the ware is used to force the soft clay against a rotating plaster mold
describing the inside shape. Flat ware is often made by jiggering.
A low-temperature-fired earthenware where the body is composed of a previously fired
clay that has been broken up and pulverised. Of Japanese origin.The word can refer
to the finished ware or to the process of manufacture.
Firing a kiln for part of its cycle with an atmosphere having no free oxygen to induce
special effects in the chemistry of the glaze. A reduction kiln allows the operator
to restrict the flow of incoming air to only that required for combustion so that
the atmosphere becomes oxygen deficient.
A manufacturing technique where slip is poured into a porous mould which absorbs
the water and leaves a layer of solid clay on the inside. The excess slip is poured
out and the object left to dry.
A manufacturing technique were the leather-hard wares were turned on a lathe prior
to the biscuit firing. The lathe could be used to thin the wall thickness of the
ware and/or could be used to incise decoration or trim the rim and foot-rim of hollow
'Vitrification' is the process of converting an alumino-silicate-rich paste into
a semi-porous or non-porous glass-like material by application of intense heat. Some
clays will only vitrify at close to their melting point and wares must supported
in the kiln to avoid slumping or deformation. Stoneware is generally fired to a non-porous,
semi-vitrified state, whilst hard-paste porcelains are strongly vitrified.