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Metal-complex dyes form complex compounds with metal ions. In practice, these dyes shows very good level dyeing, have better penetration properties, can cover up for the irregularities in the substrates, are more resistant to washing processes, and are more stable to light. In molecules of metal complex dyes, pigments and inks, metals are bound that pose a serious risk to the environment in wastewater from textile and leather production. Despite the fact that today most EU countries have strict limits on the conte...