In the metric system, series of standard paper sizes based on portions of a square meter. (A square meter is the area used to determine paper grammage, the metric equivalent of basis …

A standard metric paper size used in Europe that corresponds most closely to the United States standard letter size of 8H x 11 inches. A4-size paper is equal to 21 …

The frictional rubbing of one substance or material against another, frequently causing wear or other damage.

A property of paper referring to the degree to which a paper can maintain its surface and structural integrity under prolonged rubbing, scratching, and scuffing. Abrasion resistance is important not …

A property of a substance or material that describes the extent to which it will scratch another surface. To guard against abrasive substances, many papers, substrates, and ink films need to …

In color, a term descriptive of the relation between the light that is absorbed by a surface and the total light striking the surface. The perception of color is possible because …

A property of any porous material, such as paper, to absorb a fluid, be it ink, water, oil, or other substance. A paper’s degree of ink absorbency varies according to the type …

Alternate term for absorbance. See Absorbance.

The penetration of a fluid into the surface of a solid, as in a paper’s ability to absorb ink, water, etc., which may be more or less desirable depending on …

A process used to estimate the permanence of paper or other substrate. Depending on a paper’s chemical composition, it can have varying levels of longevity. Since normal aging is not practical, procedures have …