100g or 100gs? Looks like the grammage or the weigth (mass) of the paper
measured as the number of gramme per square meter; usually noted as g/m² but
sometimes as gsm. The higher this value, the heavier each sheet of paper
are.
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Sylvain Lafontaine, ing.
MVP - Windows Live Platform
Email: sylvain2009 sylvainlafontaine com (fill the blanks, no spam please)
Independent consultant and remote programming for Access and SQL-Server
(French)