Datamax M-class Mark II Operator's Manual page 17

Ribbon Routing (Coated Side In & Coated Side Out)
Directional Arrows near the Ribbon Supply Hub indicate the correct ribbon route. Ribbon types are
available with the ink (coating) layer wound 'in' or 'out'. Ensure the inked side of the ribbon faces the
media and NOT the printhead.
Ribbon Routing Diagrams
(CSI) 'Coating Side In' Ribbon Routing
(CSO) 'Coating Side Out' Ribbon Routing
Chapter 2 - Printer Setup 11