This ink-side-out ribbon features an open 1/2" core and is to be used for the Brady BBP11 Label Printer and BBP12 Label Printer One-color ribbon for printing a single color onto a label. R6400 Series Resin Formulation offers superior chemical and abrasion resistance when printed on the appropriate label material from Brady®. Recommended for use with materials designed to resist chemicals, such as B-492 Frozen Surface Polyester and B-481 Chemical Resistant Polyester. Combine Brady label materials with their recommended ribbon series for superior legend performance.