Soybean Ink Has Gradually Become the Development Trend (Part 2)
Published on May. 14, 2020
Among the many raw materials used in the printing industry, the environmentally friendly nature of the ink has long been strictly required and controlled by the industry. Generally speaking, green ink must have the following characteristics: heavy metal and other harmful substances low content;(2) the use of renewable resources;(3) energy conservation and emission reduction performance is good;(4) less matter is transferred. The first three are easy to understand. The last is the "migration" of harmful chemicals from the ink used to package food (such as paper that packs fast food with promotional messages) into the food.
In the new ink research and development and use of the United States and Japan in recent years, the technical progress is more outstanding.
In the late 1970s, under pressure from rising oil prices, the press association of America decided to look for alternatives to standard petroleum-based inks. After testing more than 2,000 different vegetable oil formulations, the press association researchers came up with a soy-based solution. In 1987, researchers experimented with soy ink during the printing of the gazette, an Iowa newspaper. Today, nearly one-third of newspaper presses in the United States use soy ink.
Eco Friendly Offset Soy Printing Ink
Eco friendly offset soy printing ink is not complicated to make, and the main process is to refine soybean oil and mix it with pigments, resins, and waxes. The printing industry is keen on soybean inks, not only because they are clearer and brighter when printed in color, but also because of their outstanding environmental characteristics: the degradation rate of pigment carrier in soybean inks is more than four times that of standard oil-based inks; When deinking from paper, soy ink is better removed than ordinary ink, so soy ink is more conducive to paper recycling. Other printers say they need less soy ink than regular ink to print the same amount of paper, reducing ink usage and printer cleaning costs. Soybean ink deficiency mainly in the drying speed, than the conventional ink to slow.
The American soybean association has specified the content of soybean oil in Ink, such as eco friendly soy based offset inkmust be at least 55%. If the product does meet this standard, the soybean association's soybean ink logo can be affixed to indicate that the product has met the environmental requirements. Similar to soybean ink, rice bran ink is developed by some institutions and enterprises in Japan. The main advantage of rice bran ink is that the ink volatile organic compounds (VOC) residue is low, low migration, and rice bran resources easy to achieve localization, in line with the national conditions of Japan's rice production. In addition, its ink gloss, printing in the residue of harmful substances. But the popularity of rice bran ink is not as popular as soybean ink, mainly because of the high cost of rice bran ink, full drying speed is slow, and the application of technology is not popular enough. Of course, soybean ink and rice bran ink is only a variety of green ink in the best, other such as canola ink (Germany has applications), water-based ink, UV curing ink, and other green ink, is also more and more popular.