Paper

Paper is a thin sheet of matted cellulose fibers. Largely derived from lignocellulose, paper is created from a pulp dissolved into a slurry that is drained and dried into sheets. Different types of paper are defined by constituent fiber, paper pulp, sizing, coating, paper size, paper density and grammage.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY-SA 3.0

POSTKID

Help kids fall in love with the mail — free calculators for postage, delivery times, envelope and paper sizes, pen-pal time zones, stamp counts, and letter reading level, plus friendly guides to letter writing, pen pals, postcards, and snail-mail crafts for families and classrooms.

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