Natural plant pigments, or chemically synthesized inorganic or organic pigments, contain certain harmful components.Inorganic pigments include many natural products, some of which are completely derived from mineral resources, and some are made synthetically, where the metal is part of the molecule.Organic pigments include a small portion derived from natural materials, such as vegetable dyes, but most organic pigments are synthetic. Their chemical composition is more complicated.It is generally believed that the harmful components of inorganic pigments / dye are higher than that of organic pigment / dye, and the price is relatively cheap. For example, brown: inorganic brown requires only a few yuan per kilogram; while organic brown pigments have not been produced by any domestic manufacturers, organic brown imported from Germany costs 400 yuan per kilogram.Even organic pigments, different colors, and even different specifications and models of the same color have different toxic and side effects due to different production processes. And the pigments of the same specifications and models have different manufacturers and equipment strengths, and the content of harmful components (heavy metals, polycyclic aromatic hydrocarbons, etc.) of the products are also different.
