Brother laminated tapes consist of six layers of materials, resulting in a thin, yet extremely strong label. Characters formed with thermal transfer ink are actually printed onto the underside of the laminate, sandwiched between two layers of PET (polyester film) creating characters that are virtually indestructible. Brother's unique, patented TZ tapes are designed to be extra hard wearing. Tests have shown that they can withstand heavy abrasion, electricity and lengthy exposure to chemicals, sunlight, water and extreme temperatures. TZ tapes share the same adhesive which meets the needs of all industrial environments.