N

negative - In photography, film containing an image in which the values of the original are reversed so that the dark areas in the subject appear light on the film and vice versa.

neutral pH - Offset papers manufactured with a pH of 6.0 to 8.0 on a scale of .0 to 14.0. Neutral pH factors are built into paper as a minimum value, to increase stability and improve permanence for use in printing of archival records.

nominal weight - Refers to the basis weight of the paper. Unless otherwise stipulated by the mill and customer, a tolerance of plus or minus 5 percent is allowed when calculating the nominal weight.

non-impact printers - Forms an image without impact.