Black inks are mixtures. In addition to water, the non-dye components (collectively referred to as the vehicle) might include polymeric resins, humectants to retard premature drying, pH modifiers, anti-foaming agents, biocides to prevent fungal and bacterial growth, and wetting agents (surfactants).
Black inks are made up of mixtures. Besides water, the non-dye components (collectively called the vehicle) can include polymers, humectants, pH adjusters, anti-foaming agents, biocides to prevent microbial growth, and wetting agents.