Sizing or size's a substance that's applied to materials as a protecting glaze, filler, or lubricant. It's used to change surface properties in papermaking, gilding, and the manufacture of textiles and fiberglass. Papermaking Sizing's used on cellosic fibres during paper manufacture in order to curb their tendency to absorb liquids by capillary action. By doing so, sizing keeps the ink on the surface of the paper where it was intended to remain. In addition, sizing affects abrasiveness, creasi… (More on Sizing)