One of the films of glue includes a colorant, in particular an optical whitener, which generates fluorescence radiation under the influence of excitation radiation.

A coloured tyre portion having a polymer base with added pigments for producing the desired colour, and an added optical whitener.

The film includes a whitening agent in at least one layer, and preferably includes an optical brightener to enhance the lightness of the image.

Optionally, the coating formulation may contain an optical brightening agent, a defoamer and a thickener.

The composition includes an organosilane treated water dispersible organic acid salt, a water soluble organic acid salt, a chelating agent, and an optical brightening agent.

An optical brightening agent contains one or more spiro compounds of formula (I), in which K?1 and K2¿ are identical or different conjugated systems and γ stands for C, Si, Ge, Sn or Pb.

An optical brightener is added before, during or after the emulsion polymerisation.

The film contains at least one pigment, a flame-proofing agent, an optical brightener that is soluble in the thermoplastic, and a UV absorber that is also soluble in the thermoplastic.

The invention relates to a shelf-stable aqueous detergent or cleaning agent simultaneously comprising an optical brightener and a color transfer inhibitor.

The invention relates to the localised application of an optical brightener on clothing.

Said invention is characterized in that the optical brightener is applied to the outer side of an enamel layer.