This ink-side-out ribbon features an open 1 in. core for compatibility with a wide variety of thermal transfer printers. One-color ribbon for printing a single color onto a label. R6000 Series Halogen-Free Resin Formulation offers excellent solvent, scratch and heat resistance when printed on the appropriate label material. Recommended for printing on glossy or very smooth label stocks, such as B-483 Ultra Aggressive Polyester and B-423 Permanent Polyester from Brady®. Combine Brady label materials with their recommended ribbon series for superior legend performance.