Printing knowledge

Analysis of the present situation of using environmentally friendly inks and

    some people think environmentally friendly inks are soy inks, was thought to be free of VOC's, others water-free inks are the most environmentally friendly. What so many kinds of inks mentioned above, which is the most environmentally friendly? what different from traditional ink? performance difference? price going to far? which one is the most popular on the market, most development?

    ink composition

    offset inks, ingredients including paints, oils, solvents, resins, additives, no matter how the other components match, pigments and solvent composition of all petroleum by-products, so any kind of ink, no matter how environmentally friendly, couldn't do not contain petroleum. Oils, resin plant products, less impact on the environment. Oil accounts for about 40zhi60% ink composition, most of the soya bean oil, linseed oil, and small amounts of Tung oil, castor oil, another important ingredient is a solid resin, formed by the refining of rosin. In addition, about also include the result of the solvent, which is the most environmentally unfriendly inks ingredients. Early ink materials, more up to heads of components derived from petroleum.

    the past few years, many people believe that the use of soy ink (according to United States Soybean Association's definition of soybean oil, offset printing and ink, soybean oil contains more than 20%, to call "soy ink") equal to the Green, but as in most of the oil constituents of ink is vegetable oil, the difference lies only in the percentages of various vegetable oils. When soy ink, is because the United States consumes the remaining soybean Soybean Association hopes the industry, after years of promoting, printed in soy markers have been generally acceptable to the user. However, because the public's knowledge of ink components, Japan printing ink industry since the beginning of 2009, has been changed to use the trademarks of vegetable oil inks. East China (Guangzhou) zuojinhongshu, Managing Director, said, "in fact, even with non-soy ink also is made with vegetable oil. In recent years, many customers ask about soy ink information, we will explain to the client, without soy ink, does not necessarily mean less green. Therefore, Japan Association of soy ink has dissolved in 2009, no longer emphasizes the composition of soy ink more eco-friendly concept. Group, sales of traditional ink is a little better than the soy ink. "Junior and remind you that soy ink with oil and other ingredients, not to eat.

    green ink defined

    When asked about the definition of green ink, mix and Daxing inks and chemical (Hong Kong) limited General Manager Wu Sheng-Yang, a resounding, "no ink green, depend on the definition of environmental protection. "Now seen as environmentally-friendly inks, usually refers to soybean production, zero VOC, UV or water-free inks. As mentioned above, more environmentally friendly soy ink than other inks, while the remaining ink, more or less, is to reduce VOC emissions. Wu Sheng-Yang says, "(ink) is now the most important environmental issues, is a VOC and the other is a heavy metal. "

    VOC means any volatile organic compounds containing carbon, have a serious impact on people and the environment. According to Xuan long chemical Wang Wei China reply, VOC in using process in the, will through human of surface skin or respiratory into human within, dang using improper, as operation workshop is sealed type, and ventilation bad, and operator no wearing antivirus masks, and rubber gloves, protection supplies Shi, VOC will stimulus breathing pipeline and the directly into skin surface, appeared breathing difficult, and eye conjunctival and the pharyngeal Department congestive, and dizziness, and headache, and nausea, and vomiting, and chest stuffy, and limbs unable to, and gait stumble, and consciousness fuzzy, levy-like.

    will have the severe agitation, convulsions, coma, and so on. Under the environment of long-term exposure to VOC, can lead to a nervous breakdown, hepatomegaly, female menstrual abnormalities, dry skin, or even suffer from dermatitis and so on. In the Sun, VOC and automobiles, power plants and industrial chemical reaction of nitrogen oxides to form ozone, to form particles. Accumulation of ozone, particles and other pollutants in the air are (Smog) cause of smog and reduced visibility.

    in addition to the VOC, heavy metals is another important point of the green ink. In order to ensure that the heavy metal content standard, Wu Sheng-Yang said that "for those who are relatively easy to exceed the standard of raw material, we will test every batch; those with low risk (such as Rosin), sampling and testing. Now should pay attention 8 kinds of heavy metals in the ink composition, most manufacturers would Commission an authoritative organization, such as SGS, PBBS (8 species) and PBDEs (8 species) tested. "Tung Wah Group is one of the Maytag designated supplier, Sachika said in order to ensure quality, factory will buy raw materials at a time, Hangzhou Donghua SGS test was delivered to Shanghai.

    green ink types and characteristics of

    VOC emission reduction is the ultimate goal of green ink. Zuojinhongshu says, "if environmental protection is defined as the reduction of VOC emissions, zero-VOC inks are the most environmentally friendly, but if the definition of environmental protection is to use less water, that is water-free inks. Maximum VOC emissions to the printing process, rather than simply using the ink itself. Therefore, to reduce the maximum VOC, Waterless printing process is used. "Waterless offset printing plate consists of oleophilic resin and silicone oil layer, water ink-print the graphic part of the water, no water version of the silicone layer of uniform rows of ink, the ink does not come into contact with water, avoiding emulsion. Traditional waterless inks and ink the biggest difference are differences in resin and Binder. Principle of Waterless printing, graphics-free area is a printing plate the silicone surface energy is lower, if the Ink viscosity is strong, its own force of mutual attraction, Affinity will be higher than with Silicon resin, the material here will have a strong sense of exclusion of ink. No water printing of advantages is printing Shi not using water bucket water, also not need alcohol bucket, can save cost; Sun version Shi not needed dedicated of Sun version liquid, only with General water Sun version on can, more environmental, and can large reduced discharge of sewage and the VOC; also avoid water too more makes ink not dry, and and can save with paper, and reduced sets associate time.

    in addition, zero-VOC inks, UV inks can also reduce VOC emissions. Zero-VOC VOC content of inks, but it is not zero, but less than 1%. Wu Sheng-Yang says, "(zero-VOC ink) drying time will be slower than VOC, or will some adhesive on the back (bottom). Because they do not contain solvents, there will be many difficulties in ink, and longer production time, water resistance than ink on a printing press. "Zuojinhongshu also said," in VOC uses in ink is the ink dry fast, if ink does not have which will slow down the drying time of ink. But is also for this reason, zero-VOC ink printed on the finished ink layer will be thicker (characteristically original solvent composition will be replaced by other ingredients. VOC-containing the ink dry, with the VOC volatile, thin ink layer), too much ink says ink gloss and abrasion resistance will also be enhanced. Moreover, since there is no VOC volatile, even if there are PVC and other plastic clip in print, nor waves on the surface. "

    is a more environmentally friendly UV inks, Sachika said no VOC in its composition. However, environmental protection, apart from considering VOC, recycled inks, ink-related power consumption is also one of the important points. "Conventional offset Ink solvent to achieve drying, spraying also help curing, drying, UV inks do not need to use powder, a photo ink immediately dry UV lamp, UV inks do not contain solvents, the most environmentally friendly. UV inks have a shortcoming, is printed after the paper to recycle, is difficult to dissolve UV inks, UV inks is difficult to dissolve once the curing. And UV lamp power consumption, is also required to give air conditioning reduce workshop using UV light and elevated temperature, power consumption will increase, and these are not environmentally friendly. Another point is using UV inks in addition to add the UV lamp, also equipped with special ink roller, tape, has 4-5 times more expensive than normal UV inks, materials are very expensive, plus the mentioned electricity costs will rise a lot. "Group in order to balance speed and environmental protection, one UVHY-BD4 color HS-2 environmentally friendly UV inks, recycled solvent temperature much different from ordinary ink, prices not far from the ordinary ink, the disadvantage is that drying time slightly longer than the average UV inks.

    what is the most environmentally friendly inks? zuojinhong tree went on to say that "the most environmentally friendly zero VOC-free ink water, Japan has begun, this is the direction of the future, but to control the printing process, it is still difficult. "In addition to the above green ink, Sachika also mentioned recently in Japan to promote" rice oil ink "and" raw material self-sufficiency concept "-national material used in the production of ink, reducing carbon dioxide emissions during transport. In Japanese, for example, they live on rice, rice bran can be used in industrial applications, resulting in ink. Japan, and Korea and other markets have gradually adopted the product. According to this concept, materials made in China to produce ink, do not have to use rice bran, others, such as barley, corn, sunflower etc can make oil plants also can.

    China's printing industry with environmental-friendly ink status of

    while using environmentally friendly inks is the world trend and China green ink still more difficult. Wu Sheng-Yang, "said exports to Europe, the United States, and Japan and other countries print (compared to domestic products) will have more customers using environmentally friendly inks. Because of the green ink prices are higher, generally not printed to customer requirements, printing is not going to use green ink, ink is based on domestic environmental protection advance more slowly. "Zuo said," to the group, for example, zero-VOC ink is more difficult in the country, even the big companies do not pay attention to this point. So our promotion is not focused on environmental protection, but the effect of printed products. Xiang Donghua procurement environmentally friendly printing inks company, especially in the Guangdong region, mostly to meet the export requirements and domestic production less expensive. "The concept of domestic products use green ink, not yet popular.

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