The invention relates to the technical field of
printing ink, in particular to food-grade
printing ink containing
plant-based resin capable of making contact with food and a preparation method thereof.The food-grade
printing ink is prepared from, by weight, 50-60 parts of
plant-based resin capable of making contact with food, 5-6 parts of
soybean oil, 2-4 parts of modified nano-
montmorillonite, 0.1-0.5 part of demulsifying agent, 15-20 parts of
pigment, 3-5 parts of cerate and 0.5-2 parts of anti-skinning agent; 0.5-2 parts of a
drying agent; the food-contactable
plant-based resin comprises at least one of
rosin resin and dammar resin. According to the food-grade printing ink containing the plant-based resin capable of being contacted with the food, through matching of the raw materials, the problems that plant-based resin printing ink is poor in durability and insufficient in
mechanical property are solved, the
mechanical property and
adhesive force of the food-grade printing ink are improved, and the food-grade printing ink can be firmly and permanently attached to a printing stock.