Method for characterizing a product comprises using a liquid containing a pigment-free ink as a marker and pressing onto the product

摘要

Method for characterizing a product (1) comprises using a liquid containing a pigment-free ink (4) as a marker (2) and pressing onto the product. The product has a polycarbonate surface in the region of the marker. Preferred Features: The marker is applied on the product using an inkjet printer. The product with the marker is heated to a temperature above the ambient temperature.