The effect when a pattern of halftone dots or screen angles results in uneven color. Moire patterns do not appear on screen, but are the result of misaligned halftone screen angles or misregistration on press.
An undesirable pattern that occurs when screen patterns overlap due to incorrect screen alignment or angles
When two screens overprint each other, if they are not properly angled, a moire pattern can result. The moire pattern will look something like a checkerboard pattern or a regular pattern of halation throughout the screen.