The choice of ink for food packaging box printing is very important. Ink is the basic material of food carton printing, and bad ink is also the main source of food carton pollution. Now there are a variety of ink, performance is not the same. Traditional inks for food packaging printing  mainly include resin and solvent printing inks, which contain harmful substances such as heavy metals, organic volatiles and solvent residues. Among them, solvent printing inks contain harmful solvents such as benzene, ethyl acetate, isopropanol and n-butyl ester. When printing with these two kinds of inks, the heavy metal elements in the ink are transferred through the packaging materials. After the human body directly or indirectly ingests a certain amount, it may cause the phenomenon of heavy metal poisoning.

              Pigment is one of the main substances in the production of ink. If the ink factory uses dyes instead of pigments, then the migration of dyes will also affect the safety of food cartons. In addition, if some promoters such as siloxane are added to improve the adhesion of ink, the ink will contain methanol and other harmful substances, which will also affect the safety of food box packaging. With the increasing awareness of environmental protection, health, health and safety, "green food needs green packaging" has become the consensus of food packaging and printing industry. Food packaging products need to be printed with green ink, which is an inevitable trend of commodity economy and market development.

             Risun-print manufacturers believe that printing food cartons with offset printing technology must use synthetic pigments and synthetic resins free of heavy metals and organic solvents for printing. Soybean oil ink is a new type of environmental protection ink, which uses soybean oil to replace mineral oil in the ink, and the soybean oil based ink instead of ordinary petroleum based ink. Because soybean oil is a safe and hygienic substance, the ink is non-toxic and tasteless, which can better avoid the pollution of products. Therefore, our company in printing food cartons, on the selection of soybean ink for printing.

            In recent years, some fashionable drinks and food markets are booming, and the output is quite high. Some packaging factories aim at the market trends and use flexo printing technology for printing. This is because flexo printing ink in environmental protection, health, safety has a greater advantage. The diluent of water-based ink in this process is water and ethanol, which is a non-toxic solvent with high safety factor. Flexo printing can also be printed with UV ink. Its drying speed is fast, and the printing quality is better than that of solvent based ink and water-based ink. It is also a recognized pollution-free environmental protection ink and has a broad market in the field of food packaging printing. Due to the use of flexographic ink printing, there is no need to spray powder, which can effectively avoid dust pollution and printing sticking problems.

              Therefore, only the correct understanding and selection of ink, can better improve the safety of food cartons. Relief printing is the most popular, the image and text can be printed on the convex part, the concave part can not receive the ink, when the plate and paper are pressed tightly, the ink will be printed. Printing plate material: movable type, lead plate, zinc plate, copper plate, photosensitive resin plate, etc. Some books and periodicals, bills, envelopes, business cards, etc. are still using relief printing; those requiring special processing, such as hot stamping, silver, embossing, etc.generally use relief printing.

                At present, the common is lithography, a widely used type of printing. Image and non image on the same plane, using the principle of mutual exclusion between water and ink, graphic part accept ink, do not accept moisture, non graphic part is opposite.Websit:www.risunprint.com  Contact: cathy  Mobile / Whatsapp: +86 17875315636 Skype:+86 15626183287 Email:  cathy@risun-print.com