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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.
A2 is half the size of a sheet of A1, and so forth. Common sizes used in the office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from 250 kg/m 3 (16 lb/cu ft) for tissue paper to 1 500 kg/m 3 (94 lb/cu ft) for some specialty paper. Printing paper is about 800 kg/m 3 (50 lb/cu ft). [22]
For example, an A4 sheet is 1 ⁄ 16 the size of an A0 sheet, so if it is made from 80 g/m 2 paper, it weighs 1 ⁄ 16 of 80 g (2.8 oz), which is 5 g (0.18 oz). B series [ edit ]
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 ...
1 lb = 453.6g, 3000 sqft = 278.7 sqm -> gsm weight = lb/roll weight * 1.6276; 40lb kraft paper = 65 gsm; 50lb kraft paper = 81 gsm; 60lb kraft paper = 98 gsm; If you had a ref for the basis size and available weights, it would be nice to include it in the article. The math can be yours.69.72.27.153 09:37, 29 August 2011 (UTC)
Many general-purpose office papers of weights around 21 to 27 lb (80–100 g/m 2) have been reformulated to work equally well with both inkjet and laser printers. However, this category of paper is only suitable for printing text, because the ink load is light.
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In 1982, Malaysia purchased 80 refurbished A-4C and A-4L under a modernization program called PERISTA. Forty of the airframes were upgraded with the Hughes AN/ASB-19 Angle Rate Bombing System, air refueling capability, and increased payload, while the rest were kept in the U.S. as a reserve and as a source of spare parts.