the contact adhesive layer for greater ease of printing a coating compound of contact adhesive luminescent fibers and optionally conventional additives can be used as the contact adhesive layer then labels can be obtained from this film with a contact adhesive layer which has a security function furthermore it is possible to varnish the label film with a coating compound as claimed in the invention made of varnish for example printer 39 s varnish luminescent fibers and optionally conventional additives on the film side facing away from the contact adhesive layer then labels can be obtained from this film with a varnish layer which has a security function the varnish can be a printer 39 s varnish which enables the label film to be printed or improves its capacity to be printed of course in the case of label films both the contact adhesive layer and also the varnish layer which may be present can be produced proceeding from a coating compound as claimed in the invention one advantage of the invention is that the luminescent fibers with the luminescent dyes applied to them compared to uniform dyeing with the luminescent dye particles themselves enable local concentration of the emission intensity and thus better recognizability this allows use of far lower pigment and dye concentrations overall in other words by applying dye pigments to the fiber material high local concentrations of dye with a simultaneous low absolute concentration can be achieved with reference to the coating compound as can good detectability i e a favorable signal noise ratio by mixing fibers of different luminescent colors and by different.