Abstract: There is described a process for colouring elements made of polymeric material, in particular yarns produced selectively in polyethylene (PE), in ultra high molecular weight polyethylene (UHMW-PE) and derivatives thereof, such as HSHM-PE, comprising a step of immersing the elements (10) in a liquid colourant (1) comprising at least: water (2); pigments (3) chosen from anthraquinone colorants, azo colorants and inks for the textile industry; and additives (4) comprising at least an equalizing agent (6) and a dispersing agent (7); the immersion step being performed at a temperature between 50° C. and 220° C.

Abstract: A signalling device is provided comprising: a warning unit (2) designed to emit. perceivable signals correlated with vibrations; a supporting element (6) having a substantially tubular through cavity (8) counter-shaped to a portion of a fishing rod (7); a slit (10) obtained in the supporting element (6) and developing throughout the length of the through cavity (8), the supporting element (6) being elastically deformable to permit expansion of the slit (10); and a connection unit (12) engaging the supporting element (6) to the warning unit (2).