Despite the fact that the cost of nanoparticles is relatively expensive (cost per kilogram), the final cost of their implementation is financially attractive. Why? Because nanoparticles exhibit their propertiesat low concentrations, which in many cases can be called trace. For example, to give biostatic properties to plastic, 10 ppm of nanosilver per kilogram of plastic is enough. What does it mean? That in a kilogram of plastic there is 0.01 g of nanosilver which is 0.001% of the total weight!