KET device allows, for example, to track pieces that have just been controlled, or to put a colour marker to make easier a coming parts assembly. It is a perfect device for production identification. NEGLIGIBLE NEEDS IN MAINTENANCE KET uses solid ink, which gives many benefits : instant drying of the marking and also great reduction of needs in maintenance, even if you don’t use it for a long time. Besides, KET does not need to use any solvent. CHANGING COLOUR IMMEDIATELY KET is quick, it can work on running products or on a static control station, and changing colour is almost immediate.