This ink-side-out ribbon features an open 1 in. core for compatibility with a variety of thermal transfer printers, including THT model 4042 and Intermec 3440. 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