The vast majority of black inks and dyes used in the various industries are made with a highly polluting pigment called Carbon Black, obtained from the incomplete combustion of heavy oils. For each ton of this material produced, more than 3 tons of CO2 (the main greenhouse gas causing global warming) are emitted. This high carbon footprint, the health risks, and the dependence on fossil fuels associated with this material have led to a rapid grow [...]