| abstract |
The invention relates to sensory pigments for use in foods, packagings, pharmaceutical products, paper and electronic products. Said pigments are characterised by the fact that a chemically reactive polymer layer that is 5 to 500 nm thick is applied to metallic particles, metal particles or particles containing at least one metal-oxygen compound, said particles being preferably platelet or fibre-shaped, and a layer of chromophore particles that are between 1 and 100 nm in size is applied to the polymer layer, said particles having a colour that is visible to the human eye and that changes after contact with an analyte. |