A coloured strip in various densities on the back edge of the sheet which enables the platemaker and printer to check by eye or instrument the nature of each ink film.
A coloured strip on the margin of the sheet which enables the platemaker and printer to check by eye or instrument the printing charateristics of each ink layer
Coloured strip on the back edge of the sheet, which enables the plate maker and printer to check by eye, or instruments the printing characteristics of each ink layer.
Strip of small blocks of colour on a proof or press sheet to help evaluate features such as density and dot gain. *Also called colour bar, colour guide and standard offset colour bar.