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the application to warp yarns of a thin layer of adhesive material (size) in order to increase the yarns’ resistance to abrasion and repeated stretching during weaving. During sizing the individual fibers that form the warp yarn are cemented to one another. Sizes are prepared from chemical materials, such as polyvinyl alcohol or a polyacrylamide, and foodstuffs such as starches; water is used as a solvent.
Sizing is performed on slashers. The warp yarns are unwound from back beams, immersed in the size in a vat, squeezed between rollers, passed to a dryer to remove excess moisture, and finally wound onto the warp beam of a loom. Doubled yarns are not usually sized, nor are yarns made from synthetic fibers or natural silk, which possess adequate smoothness and strength.
a finishing operation in the production and repair of metal articles, accomplished by squeezing the article to produce smooth surfaces and correct dimensions and to eliminate superficial cracks and gaps between assembled parts.
It also implies surface treatment of cast products of art or of sculpture after drawing them off a mold: smoothing of roughness and joints, final finishing of components.