Metalized Polyester (B-428) labels are designed for applications that utilize barcodes, alphanumerics, graphic symbols and logos and require nameplate-like quality. B-428 is a metalized polyester with a permanent acrylic adhesive and is thermal transfer printable.. Matte, light gray finish gives labels a rating and serial plate appearance. Labels are designed to withstand numerous solvents and variable temperatures when applied to various surfaces. UL approved;CSA accepted. Brady Authentic materials work seamlessly with Brady printers for improved printer and material communication, seamless mobile app interaction, and better performance and reliability. A ribbon is required to print this material. Use Part Number M61-R4310 for the M610 / BMP61 / M611 Label Printers or M7-R4300 for the M710 / BMP71 Label Printers.