A separate reasoning for leather and similar products in the clothing sector and many others. The product, in addition to its specific characteristics that qualify it, has other effects related to the treatment, coloring and chemical additives used in production. The Unicheck system, by reading the product code, is able to supply the elements declared and guaranteed by the manufacturer. Consumers / users can also make qualitative comparisons of products in the search not only for the lowest price but also for the optimal cost / benefit ratio.