Phone: 02 9669 6733 Fax:     02 9317 5952 abacus@abacusindustries.com.au Engraving on Promotional Items. Professional Brass Plaques. Electrical Labels Switchboards. Cylindrical Engraving on Tankards. Directory Boards, Traffolyte Signs. Cut-Out Letters, Stencils Cut to Order. Custom Made Award Plaques. Traffolyte, is a brand name for multi-layered phenolic plastic sheets suitable for engraving. Each layer is a different colour so engraved letters or shapes would be a different colour from the unengraved portions.