Procedure to mark a yarn: example of a method and application with IR recognised

This search has aimed to identify a method in order to mark a yarn, so that it can be identified and recognised among others morphologically identical. It has been chosen the linen between various natural fibres having like objective that its physico-chemical and mechanical properties remained unchanged. Clearly the scope was not, in our case, to load the substrate, but to be able to discriminate the dealt fibre from the others, without influencing its intrinsic characteristics. In the specific case it has been decided to use a vinyl monomer recognizable by FT-IR investigation. By means this one, it is possible to recognize a characteristic peak of the clawed substance that it is not overlapped between those characteristic ones of the pure fibre.