December 12, 2016


An undesirable optical effect found in halftone reproductions resulting from interference patterns caused by incorrectscreen angles. Moiré patterns (in optics, called the moiré effect, and named after a type of woven fabric also called “moiré,”
December 12, 2016

Moisture Content 

The amount of water contained in paper expressed as a percentage of the paper’s total weight. The primary constituents of paper, fibers of cellulose, have a strong affinity for water, and
December 12, 2016

Moisture Welt 

A paper web defect characterized by either a raised welt, band, or wrinkle located near the outer portion of the roll and run in the machine direction, caused by cross-grain expansion of the
February 8, 2017

Monochrome Books

Monochrome books refers to the book block for educational, consumer, trade and other books printed in black only. Visual coverage is typically less than 15% and more commonly 10% and
December 12, 2016


A printing defect characterized by a spotty, non-uniform appearance in solid printed areas. Different print characteristics have different types of mottle; there is a density mottle, a gloss mottle, or
December 12, 2016

Mottled Finish 

A paper finish characterized by an intentional non-uniform distribution of blotches of high and low gloss.

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