Tips & Tricks: Dispersion Coating

There are dispersion coatings without pigments (matt, finishing varnishes, gloss or high gloss coatings) and with pigments (silver and gold coating or Iriodin). Various polymer dispersions, or so-called modified acrylates, make up the base. Further components are water-soluble rosins, water as a solvent and diverse additives which significantly influence various characteristics like surface tension, wettability and abrasion resistance. Unlike oil-based varnish which dries via oxidation, in the case of dispersion coating, the drying process takes place completely physically: Through penetration and  evaporation of the water content, the polymer particles move closer together. The emulsion/polymer particles melt together and build a film.