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2. Grammage - Wikipedia

   en.wikipedia.org/wiki/Grammage

   In the metric system, the mass per unit area of all types of paper and paperboard is expressed in terms of grams per square metre (g/m 2).This quantity is commonly called grammage in both English and French, [2] though printers in most English-speaking countries still refer to the "weight" of paper.

3. Paper density - Wikipedia

   en.wikipedia.org/wiki/Paper_density

   The density can be calculated by dividing the grammage of paper (in grams per square metre or "gsm") by its caliper (usually in micrometres, occasionally in mils). [1] The "ISO 534:2011, Paper and board — Determination of thickness, density and specific volume" indicates that the paper density is expressed in grams per cubic centimeter (g/cm ...

4. ISO 216 - Wikipedia

   en.wikipedia.org/wiki/ISO_216

   A standard A4 sheet made from 80 g/m 2 paper weighs 5 grams (0.18 oz), as it is 1 ⁄ 16 (four halvings, ignoring rounding) of an A0 page. Thus the weight, and the associated postage rate, can be approximated easily by counting the number of sheets used. ISO 216 and its related standards were first published between 1975 and 1995:

5. Paper - Wikipedia

   en.wikipedia.org/wiki/Paper

   In Europe and other regions using the ISO 216 paper-sizing system, the weight is expressed in grams per square metre (g/m 2 or usually gsm) of the paper. Printing paper is generally between 60 gsm and 120 gsm. Anything heavier than 160 gsm is considered card. The weight of a ream therefore depends on the dimensions of the paper and its thickness.

6. Talk:Kraft paper - Wikipedia

   en.wikipedia.org/wiki/Talk:Kraft_paper

   Kraft paper is sold in the US to schools in 40lb and 50lb weights. Kraft wrapping paper for shipping is also available in 60lb weight. The basis size for these weights is 3000 sqft (same basis as for newsprint, = 500 sheets at 2ft x 3ft per sheet). 1 lb = 453.6g, 3000 sqft = 278.7 sqm -> gsm weight = lb/roll weight * 1.6276; 40lb kraft paper ...

7. Paper and ink testing - Wikipedia

   en.wikipedia.org/wiki/Paper_and_ink_testing

   (Mass is usually measured as weight at a location with sea-level gravity.) Paper sheets are cut to a size of 10 cm × 10 cm, then the sheets are weighed individually. The mean of the weights is used to calculate the mass of the paper per square meter, and the standard deviation is determined from all samples.