A process for making molds for retroreflective sheeting and like articles
includes making a substrate having a structured surface of geometric
structures such as cube corner elements. The structured surface is in one
embodiment partially replicated from a previous generation structured
surface, and partially machined in the substrate. At least one of the
faces of the structured surface is a compound face that has one machined
portion and one non-machined portion, such as a replicated portion. The
process can be used to manufacture substrates with desirable geometry
cube corner elements, such as cube corner elements having a hexagonal
outline in plan view, without requiring the use of pin bundling
techniques or laminae. The process can also be used to manufacture
articles having cube corner elements in which at least one face of the
cube corner element has two constituent faces disposed on opposed sides
of a transition line that is nonparallel to a nondihedral edge of such
cube corner element.