Mr. Yang, who lives in Dongcheng District, Beijing, recently discovered that the packaging of disposable toiletries is printed with "soy ink printing" and is accompanied by an environmental protection logo. Not long ago, Mr. Chen bought a new notebook with the words "Soybean Ink Printing" and the environmental protection logo on the back of the word. Mr. Chen found that now, many printed products, such as notepads and some paper packaging, can find the shadow of "soy ink", especially for some beautifully made paper products. The green printing industry of "soy ink" The concept of environmental protection has become an important factor in some fashion items. So, what is "soybean ink" and how is its environmental performance reflected?
Environmentally friendly inks are increasingly popular-children's books and food packaging can find traces of soybean ink
As early as the autumn of 2012, 1.5 million copies of primary and secondary school textbooks in Beijing were printed in green, which accounted for more than 30% of the total use of primary and secondary textbooks. Yan Jinqian, deputy general manager of Lianxing Shengye Company, introduced that green printing requires that the content of 8 heavy metals such as lead, chromium, copper, and mercury in the ink should not exceed the standard. The current textbook uses soybean ink printing. "This ink will not have much impact even if people eat it."
In the children's book area of ​​Beijing Zhongguancun Book City, the reporter saw that many books used soybean ink. Sales staff told reporters that genuine children's book paper, printing inks and glues are very careful, not only use paper with a large content of wood pulp, but also use environmentally friendly inks for green printing, especially paper books read by children under 3 years old , Will use a variety of technologies to isolate ink; and in the production process, the use of rounded corners (paperback) or wrap angles (hardcover) in the production process, fully consider the safety of children. But pirated books are difficult to achieve for low prices.
Soy ink print
In addition, some product packaging also uses soybean ink. In addition to the packaging of toiletries that Mr. Chen has seen, some food packaging also uses soybean ink. Xiang Piao Piao milk tea once said that its paper cups are all printed with soybean ink. The relevant person in charge said that compared with traditional inks, soybean inks not only have better color, high concentration, good gloss, better water adaptability and stability, wear resistance, drying and other properties, but also more important , Soy ink does not contain lead, chromium, cadmium, mercury, arsenic, barium and other harmful metal elements, especially suitable for children's products. Moreover, the printed matter printed with soybean oil ink is easier to deink after recycling and can be recycled to produce better quality recycled paper.
High price and low overall cost-15% higher than the general ink ductility
Previous data showed that compared with traditional inks, the price of soybean ink is 28% higher, which also means that the cost of products printed with soybean ink will be higher. Despite the increase in raw material costs, the former spends less on pigments, volatile organic compounds, and printer cleaning costs. According to experts, less soybean ink can be used to produce brighter and more eye-catching prints than petroleum inks. Soybean ink is purer than petroleum extracts. To achieve the same dyeing effect, the former requires less pigment and reduces ink costs. The Illinois Department of Energy and Resources ’Hazardous Waste Research and Information Center conducted a survey on soybean inks in the 1990s, and many printers reported:“ Soybean inks can be 15% more ductile than general inks, further reducing In order to reduce the amount of ink used, printing costs are reduced. "At present, this technology accounts for a quarter of the market share in Japan, Europe and the United States.
In fact, the economics of soybean ink are also reflected in other aspects. Soy ink contains edible oil, renewable, non-hazardous, good recycling; scratch-resistant, light and heat resistant: unlike traditional inks, the words on the book will be printed on the hand by accident, nor will it be heated by the copier Sticky paper, irritating odor; rich colors: soybean ink has a wide range of colors, the same amount has a better effect than traditional ink; deinking is easy to handle: soy ink is more easily deinked when recycling waste printed materials than traditional ink The damage to the paper is small, and the waste residue after deinking is also better degraded.
How is soybean ink environmentally friendly-reducing carcinogen volatilization and reducing oil consumption
Regarding what soybean ink is, and how is it environmentally friendly? The reporter interviewed relevant experts. Feng Jing, deputy chairman and secretary general of the China Daily Chemical Industry Association and chairman of the ink branch, told reporters on the phone that at present, the entire ink industry is promoting green ink, and soybean ink is one of them. Feng Jing introduced that, as the name implies, soy ink refers to ink made with soybean oil instead of traditional petroleum solvents. She explained that soybean ink is a lightly purified soybean oil, mixed with additives such as pigments and resins. Substituting vegetable oil for petroleum reduces the use of fossil raw materials and can alleviate resource constraints. In addition, soybean ink requires less volatile organic substances than petroleum ink, which can reduce air pollution, and its pigment degradation rate is also 4% of standard gasoline ink. Times.
Specifically, soybean ink is free of VOCs volatile substances. "VOCs are volatile organic compounds contained in petroleum and contain aromatic polycyclic hydrocarbons. They are one of the strongest carcinogens." Ink manufacturing, printing, and drying processes Or during equipment cleaning and waste ink treatment, a large amount of organic components are volatilized, which not only seriously harms the health of production operators, but also causes great damage to the environment. At present, the volatilization of VOC in printing inks has become one of the important sources of environmental pollution . When manufacturing ink, printing drying, or cleaning manufacturing equipment and printing facilities, if soybean ink is used, VOCs emissions will be reduced, which is beneficial to the environment and health. In addition, vegetable inks are not non-renewable resources like petroleum-based inks. For example, soybean oil contained in soybean ink is a sustainable and biodegradable rich resource. It can continuously provide raw materials for ink production, and has good environmental protection. The use of vegetable oils (such as soybean oil) to replace some petroleum mineral oils to make inks can promote the industrial use of vegetable oils in various countries, expand the application range of vegetable oils, and at the same time reduce the consumption and import of non-renewable oil and save foreign exchange.
China has not yet issued relevant standards-US regulations: Offset sheet paper ink is not less than 20%
Whether soybean oil is added to the ink can be called soybean ink? "Of course not, there must be a certain proportion." Feng Jing told reporters that although soybean ink is used more and more frequently, there is no relevant standard in China. The addition ratio of soybean oil is specified. The lack of standards also plays a key role in the environmental performance of soybean inks. Feng Jing also introduced that in China, the use of soybean ink is not as popular as everyone sees. In fact, more environmentally friendly ink products have entered various fields of life, but everyone still does not understand it.
The reporter learned through a network search that the American Soybean Association made specific regulations on the content of soybean oil in the ink, requiring that the content of soybean oil in the ink of the thermosetting offset printing wheel transformation should not be less than 10%, and that the offset sheet ink should not be less than 20%. Foaming ink is not less than 40%, offset news ink must be more than 55%. If the product does meet this standard, the “SOYSEAL†logo of the Soybean Association can be affixed to indicate that the product has met environmental protection requirements.
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