Everyday copying runs on the lightest common weight, and that is fine until you print double-sided, where the text on one face shows through the other and a slightly heavier sheet fixes it. Whiteness affects how printed colour reads and how sharp black text looks. Once usage is steady, buying by the carton costs less per sheet than by the ream. See A3 paper and printing supplies.

Double A A4 copy and presentation paper arranged beside a printer in a bright modern office workspace.