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Sublimation printing paper have many gsm,and the grams determine the thickness of the paper.And the sublimation paper for shirts,most customer like to using 100gsm and 90gsm for Epson printer F6200/F6270 etc.
link:https://www.subpaper-source.com/sublimation-paper/sublimation-paper-gsm1.html
sublimation paper gsm