In colour printing, the plate used as a guide for registering other plates.

Plate that prints the most detail, thus whose image guides the register of images from other plates. Also called key printer.

In process color printing, it is the plate with the most detail. The other plates must be registered to the key plate.

A small plate or escutcheon having only a keyhole.

The printing plate that is used as a guide for the other plates in the color printing process; it usually has the most detail.

A printing term referring to a printing plate (usually the black plate) used as a guide to position and register additional colors.

In color printing, the plate used as a guide for the register of other colors. It normally contains the most detail. to top

The printing plate which sets the register position for the other plates.

The plate in a set of four color plates that carries the most detail to which other plates are registered.

In printing, a key plate was the plate which printed the detail in an image.