It is a water-based additive for interior use developed with the innovative technological power of silver nanoparticles. When added to paint or coating, it gives the surface comprehensive and lasting protection against the aggression of bacteria, yeasts, moulds, and algae. The paint admixed with FLUO_INK antibacterial additive can reduce the bacterial load  by 99%. The efficacy of this treatment is tested in accordance with the ISO 22196 standard.