What do you mean by "GSM" on the printing paper?
This is the meaning of paper weight;GSM is the unit of paper;70GSM is 70 grams per square meter;80GSM is 80 grams per square meter;The larger the GSM, the higher the quality of the paper.
Weight means 70 grams per square meter. It is the unit of paper and, to some extent, the quality of paper.