A widely used tool, these products have been incorporated into several stages of the tire making process including marking raw material bales, fabric cord calendaring, tread and sidewall extrusion, inner liner calendaring, tire building, and inspection.

C-series Ply Marker Crayons, or fugitive crayons, are used to mark uncured (internal) rubber surfaces such as calendered material, plies, and bead rings. They can also be used to mark cured (external) rubber surfaces such as defect areas during visual inspection.