Edited sentence: Although this article discusses paper density, this is clearly a misnomer.As evidenced above, the basis weight of paper is in units of mass divided by area.Due to this, the density of paper shown in the calculations above is literally an area density.Since scientific nomenclature is uncommon in the paper industry, it is both accurate and inappropriate to call the basis weight of paper its area density.Thus, grammage and paper density use an unpopular dimension, which in the scientific community is known as "spread rate" or "area density"