The process by which a substance (typically gelatin or starch) is added to paper.  Sizing provides resistance to the absorption of moisture and eliminates ink feathering and bleed through.  

In the papermaking process, after the sheet is formed, it may be either "surface sized" - pained or brushed onto the surface - or "tub sized" - immersed in a bath.

Last updated on January 29, 2010 by Joshua Levine