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Card stock is often used for business cards, postcards, playing cards, catalogue covers, scrapbooking, and other applications requiring more durability than regular paper gives. The surface usually is smooth; it may be textured, metallic, or glossy. When card stock is labeled cover stock, it often has a glossy coating on one or both sides (C1S or C2S, for "coated: one side" or "coated: two sides"); this is used especially in business cards and book covers.
Most nations describe paper in terms of grammage—the weight in grams of one sheet of the paper measuring one square meter.
Other people, especially in the United States, describe paper in terms of pound weight—the weight in pounds of 500 sheets of the paper with a given area: for card stock, this is 17 by 22 in (432 by 559 mm); for text stock (thinner paper, as used for writing and in books); this is 20 by 38 in (508 by 965 mm). In describing paper, the pound is often symbolized by the pound symbol, #. Because of the difference in the way text- and card-stock pound weight is determined, a sheet of 65# card stock is thicker and heavier than a sheet of 80# text.
The weight of cardstock ranges from 50# to 110# (about 135 to 300 g/m2).
Rather than as a function of weight per sheet of a given area, paper thickness can be measured and stated directly, in units of linear measure. In the United States, this usually is expressed in thousandths of an inch, often abbreviated thou points (pt. and pts.) and mils. For example, a 10 pt. card is 0.010 in (0.254 mm) thick (corresponding to a weight of about 250 g/m2), and 12 pt. is 0.012 in (0.3048 mm). The thou point (1/1,000 inch) differs from the typographical point (1/12 traditional pica = exactly 0.01383 inch = 0.35136 mm).
The length and width of card stock often are stated in terms of the ISO system of paper sizes, in which specific dimensions are implied by numbers prefixed with the letter A. Card stock labeled A3, for example, measures 420 × 297 mm (16.5 × 11.7 in).
- "Paper Weight, Paper Size, Coated Paper, Matte Paper". Printing Industry Exchange, LLC. Nov 2004.
- "Paper and Card Stock Comparison Chart" (PDF). The Paper Mill Store. 1 March 2018.
- "Paper Sizes".
- "Understanding Card Stock Weights".
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