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In Europe and other regions using the ISO 216 paper-sizing system, the weight is expressed in grams per square metre (g/m 2 or usually gsm) of the paper. Printing paper is generally between 60 gsm and 120 gsm. Anything heavier than 160 gsm is considered card. The weight of a ream therefore depends on the dimensions of the paper and its thickness.
Before the end of the 20th century, [when?] papermakers replaced the abacá fibers with wood pulp, [3] which cost less to source and process. [4] Despite the change in production material, "the name and color remain." [4] Since at least 1915, manila paper has been shaped to create manila file folders and manila envelopes. [5]