Brightness: measured by the light that white paper reflects
Calendering: paper is run between steel rollers to smooth the paper; helps reduce the amount of moisture in the paper
Caliper: thickness of a sheet of paper; affected by the weight or finish
Finish: the appearance, feel, and texture of a paper
Genuine watermark: a faint design embedded into the paper during manufacturing while the loose fibers are still wet.
Grain: the direction in which most of the fibers lie
Holdout: ability to keep ink on the paper’s surface, rather than seeping into the body of the sheet
Opacity: decided by its absorbency, ingredients, and weight; ability to determine how much printing will “show through” on the reverse side of a sheet.
Weight: the thickness of a paper stock; measured in pounds (#)