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Back ground: It is the surface to which the first coat of plaster is applied.
Blistering: This is the development of local swellings on the finished plastered surface due to residual unslaked lime nodules.
Cracking: This is the development of one or more fissures in the plaster due to movements in the back ground or surrounding structure.
Crazing: This is the development of hair cracks, usually in an irregular pattern, over the finished surface.
Dado: This is lower part of plastered wall, where special treatment is given to make it better resistance.
Dots: These are small projections of plaster, laid on background for fixing of screeds etc. The size of dots may be 15 cm x 15 cm.
Dubbing coat: This is the process of filling up hollow spaces in the solid background, before applying the main body of the plaster.
Finishing coat: It is the final coat of plaster. Such a coat is also known as setting coat r skimming coat.
Flaking: It is the process of scaling away patches of plaster of previous coat, due to lack of adhesion with the under – coat.
Gauging: It is the process of mixing various constituents of plaster.
Grinning: It is the reflection or appearance on the surface of plaster, of the pattern of joints or similar patterns in the background.
Grounds: These are the wooden strips fixed to the back – ground to which primary finishing may be secured.
Hacking: This is the process of roughening the background to provide suitable bond or key for plastering.
Keys: These are openings or indentations or corrugations on the background or surface of under – coat, to which plaster will form mechanical bond.
Laitance: When freshly laid concrete or mortar is subjected to excessive trowelling a screen consisting of thin layer of fine cement particles is formed. This layer is known as laitance.
Peeling: This is the term applied to the dislodgment of plaster work from the background.
Under – coats: These are the coats of plaster applied under the finishing coat.
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