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,” …
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 …
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 …
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 …
Mottle
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 …
Mottled Finish
A paper finish characterized by an intentional non-uniform distribution of blotches of high and low gloss.