Thermal Barcode Label Printer Thermal printing refers to a digital printing process that produces a printed image by passing paper with a thermochromic coating, more commonly referred to as thermal paper, over a print head that consists of small heated elements. The coating turns black when heated and this is what produces the image. Toshiba offers the highest quality thermal transfer barcode printer options for your business. Our compact thermal barcode label printer options and thermal printing innovations can be used wherever you are, and are accessible right at your fingertips. Our portable and cool black EP4-inch thermal transfer barcode printer options are the ultimate in wireless functionality and reliability on the move.