Grammage/Basis weight

Purpose
Paper and paperboard are manufactured and traded by grammage, which is a vital quality characteristic. The grammage or basis weight of a paper is expressed in grams per square meter
The Basis weight of paper is the weight per unit area. This can be expressed as the weight in grams per square meter (GSM or g/M2), pounds per 1000 sq. ft. or weight in Kgs or pounds per ream (500 sheets) of a specific size. Paper is sold by weight but the buyer is interested in area of paper. The basis weight is what determines, how much area the buyer gets for a given weight. e.g. if basis weight is 50 g/m2, for every 1 kg weight, the buyer gets 20 m2. When the basis weight is expressed as ream weight, it tells the buyers how many reams he/she getting for a given weight. For papermaker basis weight is important from point of view of production rate. For a given machine deckle and machine speed, the production rate per day in MT will be = Machine Deckle (m) * Machine Speed (m/min) * Basis Weight (g/M2) * 1440/1000000.

Principle
For grammature determination, specimens measuring 10 x10 cm are cut from climatized paper samples and weighed. The reading are converted to correspond to an area of 1 m².

How to use
Fold example test
Input follow the example test to sheet cutter ; Double 4
Hold example test and depress hilt of swing downwards : Follow the example of test cut
Deliberate example test
Note weighing machine weight follow the example of test : Weight follow the example of test divided 4
Count weight follow the example of test (gr/m²)