Basis weight: 1) In America, the weight in pounds per ream of paper cut to basic size. (2) With ISO range of papers, it is the weight of paper in grams per square meter. Also called Substance.

• 基重:（1）在美国，基重是某基本纸度的每拈重量，以磅为单位。（2）属国际标准的纸，基重是一平方米的重量，以克为单位。写法是克每平方米。亦称定量。