Abstract: A system for establishing the manufacturing and/or production history of textile material (1) being produced in strip or sheet form, in which magnetizable data carrier means (4,5) is incorporated in the strip or sheet material during the production thereof; means (8) for magnetically implanting information characteristic of and/or relating to materials used and production and manufacturing conditions prevailing at predetermined operation stations, machines, locations or the like along the route taken by the textile material during the production thereof; and means (9) for reading or otherwise interrogating the magnetizable means or material for the purposes of deriving from said information/data signals utilizable for establishing said manufacturing and/or production history.