plaster or plaster of Paris
plaster trap - A receptacle fitted under a sink to provide a filter in the draining system. Waste plaster is strained off when tools, etc., are being cleaned.
Plaster or plaster of Paris
The term plaster usually refers to plaster of Paris (also called gesso)- a pasty composition that hardens on drying and is used for coating interior walls, ceilings, and partitions.
gesso - gypsum, chalk or plaster of Paris mixed with glue and applied to a surface as an absorbent primer for paint, gilding etc.
GESSO: an under painting medium made of glue, plaster of Paris or chalk and water
GESTURE: the implication of motion in a shape
GLAZE: a glass-like coating that makes ceramics waterproof ...
gesso A mixture of glue and either chalk or plaster of Paris applied as a ground or coating to surfaces in order to give them the correct properties to receive paint. Gesso can also be built up or molded into relief designs, or carved.
The earliest type of gesso made in medieval times used parchment glue and well-slaked plaster of Paris. The curds from long-soured milk were also used in place of the glue. Later recipes included rabbit-skin glue and precipitated chalk and whiting.
A mould was made by pouring plaster of Paris over a page of type and leaving it to set; molten metal could then be poured over the face of the mould in a casting box.
Calcined gypsum, also called plaster of Paris, when mixed with animal glue, makes a luminous painting surface for fresco and for paintings on wood panels. Medieval painters applied as many as ten layers of gesso on wood panels.
Basically a mixture of plaster of Paris (90%), Portland cement (5%) and crystalline silica (5%) andoften referred to as Hydro-Stone Gypsum Cement. Hydrostone is a U.S. gypsum product which is considerably harder than plaster of Paris alone.
Gesso: An underpainting medium consisting of glue, plaster of paris, or chalk and water. Gesso is used to size the canvas and prepare the surface for painting.
Sculptors often build small preliminary works called maquettes of ephemeral materials such as plaster of Paris, wax, clay, or plasticine, as Alfred Gilbert did for 'Eros' at Piccadilly Circus, London.
setting - The hardening process of paint, plaster of Paris, concrete, resin, an adhesive, or any other material which must harden before working with it further. Also see bleeding through and hot glue.
Plaster: fine white powder, which when mixed with water to a paste or creamy consistency, sets to a hard, cohesive mass: gypsum plaster used for sculpture is called Plaster of Paris because gypsum came from around Paris, France: Plaster, ...
After staining the wood the most approved method of filling the grain is to rub in fine plaster of Paris (wet), wiping off before it "sets." After this is dry it should be oiled with linseed oil and thoroughly wiped off.
Gypsum
A soft, transparent, mineral composed of hydrated calcium sulfate. Historically gypsum was used for carvings and as a paint pigment or ground. Burnt gypsum is commonly known as plaster of Paris.
 See also: Plaster, Painting, Movement, Composition, Plate
  
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