GHOSTING
(1) An image that appears as a lighter area on a subsequent print, due to local blanket depressions from previous image areas. (2) Marring of a print by an image on it of work on the reverse side which has interfered with its drying, so that differences in the trapping of some colors or gloss variations are apparent.

GLOSS
Gloss can refer to the reflectivity of paper itself or of the printed result on it. Gloss of paper is measured by using a Gardner gloss meter, which measures reflected light at an angle of 75°, and is expressed in Gardner gloss units - the higher the number, the glossier the paper surface.

GRAIN DIRECTION
A term applied to the machine direction of papers or boards, as opposed to the cross direction.

GRAMMAGE
The term used to denote the weight of paper or board; the measurement used is the weight of a single sheet of one square meter, expressed as grams per square meter (g/m2).

GREASEPROOF PAPER
Paper that resists grease, or prevents the fats found in some goods from soaking into it. The paper is produced by prolonged beating in the pulp stage.

GREEN PAPER
Immature paper that has not been conditioned or had the opportunity to mature naturally.

GRIPPER
A device on a printing machine for holding the sheet during the printing or similar cycle.

GRIPPER ALLOWANCE
The margin of paper along the gripper edge of the sheet held by the grippers and that, therefore, cannot be printed.

GRIPPER EDGE
The edge of the sheet presented to the gripper. The edge of the plate that is fitted to the leading clamp of the cylinder.

GROUNDWOOD PULP
Mechanical pulp made by grinding wood against an abrasive surface, e.g., a stone.