The high-grade water based ink is formulated with the nanoscale organic(inorganic) pigments, imported special aqueous emulsion and related additives, made after a certain physical reaction; non-VOC emission, non-toxic and odorless, non-heavy metal and plasticizer , non-flammable, non-explosive, OHS safe, fully meets the requirment of food packaging ; used simply after adding water or acohol and with strong color exhibitions. The high-grade water-based ink is specially designed for food flexible packaging.