Also known as a tool mould is a metal block, usually steel or aluminium, that is carefully eroded on one side to leave the shape of the kit sprue mould usually comprises two halves which are brought together during the injection moulding process and then taken apart to leave the finished sprue. During the process, hot plastic is poured into the mould which runs into the channels and takes the form of the sprue. Once cooled, the plastic is removed from the tool as the finished sprue release agent can also be used to ensure the plastic doesn't stick to the mould.
hollow (or negative) container used in casting to shape material allowed to harden in it. A typical mould is made of Plaster of Paris: A waste mould can only be used once because it is detroyed when removing the cast. Piece moulds may be reused. See also Casting, Foundry
A plaster shape designed to pour slip cast into and let dry so the shape comes out as an exact replica of the mould. Nodders Porcelain figures with detachable heads which oscillate. Old Gold A yellow colour applied to the edge of an object, usually earthenware, to give the semblance of a gilded edge.
Normally consists of a top and bottom form, made of sand, metal, or any other investment material which contains the cavity into which molten metal is poured to produce a casting of definite shape and outline. The American spelling of this word is "mold". See Mold.
Most commonly, a hollow (negative) container used in the casting process. Plaster is the most traditional material for molds, though they may also be made of latex, rubber or gelatin. Also, a form over which materials such as molten glass and leather-hard ceramics are draped to shape them. 1. Usually a plaster form, single or multi-pieced, which will be used to reproduce any number of accurate copies of the original model in clay or plaster. 2. In papermaking, a type of tray, made with wire mesh in a wooden frame, over which the paper pulp is spread. In fine art and manufacturing, a cavity into which a fluid, such as metal or plastic is poured, which hardens, to produce the desired finished piece.
a mycelial microfungus or a visible growth of such a fungus. Blue mould or green mould is caused by Penicillium spp.; grey mould, by Botrytis cinerea; sooty mould is caused by one of the Capnodiaceae but the term has been used incorrectly for growth of Cladosporium spp. and other fungi on foliage, etc. See mildew, yeast.
The growth of mould on a paint film causes severe discoloration. Mould is a plant growth that requires moisture, the presence of food and the correct temperature for growth. The defect can occur on most types of paint but is most prevalent in bathrooms, kitchens and exterior walls that are in shady positions. The paints that are most susceptible are soft oil-based paints or varnishes and emulsions, especially if they are low gloss where dirt can be trapped in the film. Often the mould growth can be killed and color removed by washing with dilute sodium hypochlorite solution taking due care as this preparation is alkaline. Safety glasses and gloves have to be worn. Before repainting, susceptible surfaces should be prepared with anti-mould preparations, like sodium pentachlorophenate and by using either paints prepared with mould inhibiting pigments, like Zinc oxide, or by using high gloss finishes. In extreme cases it may be necessary to remove the high humidity in the room by using exhaust fans.
A fungal growth on timber or other wood products at or near the surface and, therefore, not typically resulting in deep discoloration. Mould is usually ash green to deep green, although black and yellow are also common. See also Mildew.
The main tool for hand-papermaking, it is a flat screen that filters an even layer of fibers through it to form the sheet. In western papermaking, it is accompanied with a wooden frame called a deckle.
Many identical images in clay can be made quickly by using a mould. The moulds themselves were made from wood or clay, in one or two parts, and were used to make figures, faces, or details of sculptures. In some instances moulds were used even when quantities of an image were not planned, for instance with Moche portrait vases depicting actual people.
A member of construction or decoration, treated to introduce varieties of outline or contour in edges of surfaces, whether on projections or cavities, as on cornices, capitals, bases, door and window jambs and heads.