Grams per Square Metre
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GSM Gram per squared meter g/m2
total wight-500gm size-13x10 what is gsm?
u can use 250 GSM paper or 253 GSM for 3 ply box.
GSM stands for Grammes per Square Metre - and is how the quality of paper is measured. Normal office paper is either 60 or 80 grammes - good quality paper would be 100 to 120 grammes. Actually, it is how the THICKNESS of paper is measured, in a roundabout way. The more paper weighs, the thicker it is.
The weight of the paper in gram per square meter. Note that the weight in pounds is not the weight per square foot, but the weight of 500 of some arbitrary size sheet (for copy paper it is for a 17x22" sheet - for book paper it is 25x38". ). 20# copy paper or 50# book paper is about 75 gsm.