Sensory pigments for use on food, packaging, paper as well as pharmaceutical and electronic products

摘要

Printing ink containing sensory pigments for use on or in food, packaging, pharmaceutical products, paper and electronic products, characterized in that on metallic, metal-containing or at least one metal-oxygen compound containing particles (1) with preferably platelet-like or fiber-like form with a size of the longer particle axis greater than 300 nm, a 5 to 500 nm thick layer of at least one chemically reactive (bio) organic or inorganic polymer (3) is applied, on top of it at least one layer of chromophoric particles (4) with a size between 1 and 100 nm is applied, and these pigments are mixed with a binder (5) for application or are self-adhesive, and the choice of the layer thickness of the polymer (3) on these pigments is a color that is visible to the human eye or measurable in the infrared by means of resonance-enhanced optical Absorption results, which results from chemical Reakti on of the polymer (3) changed.