Ink

Ink is a gel, sol, or solution that contains at least one colorant, such as a dye or pigment, and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill. Thicker inks, in paste form, are used extensively in letterpress and lithographic printing.

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Source: Wikipedia · Image: Wikimedia Commons · CC BY 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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