The process of applying sizing (a starch or chemical coating) to fabric or paper to give it stiffness or a desired finish.
From sizing, which comes from size (a glue-like substance used to stiffen materials). The term originated from the practice of treating cloth with animal glue.
Paper makers have been cising (sizing) paper for centuries with animal glue, and the way sizing works is kind of magical—it makes water-repellent patterns that control how inks spread and how pages feel when you touch them.
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