In the case of offset printing, the outer copper layer is coated with a chrome layer in which the printing pattern is etched.

Calcutta is not just about snapshots of ragged children cared for by Patrick Swayze in the slums and orphanages that were run by Mother Teresa.

In the case of rotogravure, this outer copper layer has a thickness which equals or slightly exceeds the desired maximum well depth of the printing pattern later to be made in the outer surface of the surface sleeve.