OD: Outside diameter of a cylinder, roller, or roll of labels.
Off-Cut: That part of the trim width that is not utilized. Usually a narrow roll which is left over because the customer placed in order which does not utilize the full master roll width.
Opacity: The measure of the amount of light that can pass through a material. The hiding property of ink film; property of film allowing printed material to show through in varying degrees.
Opaque Ink: An ink that is not transparent and reflects only its color regardless of what colors in overprints.
Orientation: The alignment of the crystalline structure in polymeric materials so as to produce a highly uniform structure. Can be accomplished by cold drawing or stretching during fabrication. Also the alignment of bars and spaces to the scanner. Can also be the reference towards the direction and wind position of the “production ready” roll of labels.