RECESS PATTERN IN A RUBBER ARTICLE

Provided is a method and a device of marking a rubber article (102) , the method comprising: generating a recess pattern in the rubber article by removal of rubber material, the recess pattern defining a digital code pattern comprising a plurality of code modules; the recess pattern comprising a first recess portion (124) and a second recess portion (126), the first and second recess portions being recessed with respect to an unaltered surface of the rubber article; the first recess portion (124) and the second recess portion (126) defining therebetween a protrusion protruding over a bottom of each recess portion; wherein a pitch(136) between the first recess portion and the second recess portion is larger than 0.5 mm or wherein the first recess portion and the second recess portion are part of a recess surrounding the protrusion and the protrusion has a base area of more than 0.2 square millimeters.