The hottest textbook printing loves environmental

Textbook printing falls in love with environmental protection

the voice of green printing is growing. In the autumn of 2010, textbooks are being printed. According to the interview, textbook printing, which accounts for half of the printing of books and periodicals, has also become increasingly environmentally friendly in recent years, which is mainly reflected in the materials and processes used. In terms of paper, light paper has gradually become one of the mainstream papers in primary and secondary school textbooks in recent years because of its advantages of light weight and environmental protection; The natural color paper produced from crop straw has been used for textbook printing since 2010. In terms of technology, the film covering technology of the cover of primary and secondary school textbooks has been gradually eliminated and replaced by a more environmentally friendly glazing technology; At the same time, some regions have tried to replace offset printing with environmentally friendly flexo printing in 2010

general trend: light paper has gradually become the mainstream paper for teaching materials. Yunnan should go beyond the development of

reducing the burden on schoolbags for primary and secondary school students has been a hot topic in recent years. Light paper has been favored by publishers and printers because of its light weight and environmental protection performance. In recent years, it has gradually become one of the mainstream paper for primary and secondary school teaching materials

the trial of light paper for teaching materials in China began in 2003. At the end of that year, the general office of the General Administration of publication said to the reply on Approving the trial of light paper for printing teaching materials for primary and secondary schools in some regions of the people's education press that it was approved to try light paper for teaching materials for primary and secondary schools in some regions, with a trial period of two years

in recent years, light paper has been widely used in primary and secondary school textbooks. From the documents issued by local price departments and publishing management departments, we can roughly see the promotion process of light paper in various places. In 2007, spring textbooks in Hebei and Hunan began to use light paper, and autumn textbooks in Guangxi and Shanxi began to try light paper; In 2008, some spring textbooks in Jiangxi used light paper, and two autumn textbooks in Sichuan used light paper; In 2009, the spring textbooks in Guizhou tried light paper; In 2010, Guizhou officially issued a document to supplement the price of light paper in the printing price of primary and secondary school textbooks

this trend is also confirmed by interviews. Most primary and secondary school textbooks in Jiangxi and Hebei are printed on light paper. SunLiang, general manager of Jiangxi education printing industry Co., Ltd., which prints 20% of primary and secondary school textbooks in Jiangxi, said: the number of textbooks using light paper in Jiangxi's autumn textbooks this year has increased compared with last year. 80% of the primary and secondary school textbooks printed by our company use light paper. Zhangrenhui, deputy director of the second Xinhua printing factory in Hebei Province, said that 80% of primary and secondary school textbooks in Hebei Province are printed on light paper

expert: there are many advantages and many problems

textbooks are usually printed with double offset paper, and the thickness of light paper is similar to that of double offset paper, But it's heavier than using double tape "The books printed by both materials and design talents in Colleges and universities have been reduced by 20% - 30%, so light paper has become the best substitute for double offset paper. In addition, light paper is made of the environmental vibration standard GB 10070 (8) 8 pulp in Chemical City area, does not contain fluorescent brighteners, and is mostly beige or milky white without coating treatment. Therefore, light paper also has the advantages of protecting vision and protecting the environment.

although light paper has the above-mentioned advantages However, some industry experts and people from printing plants and quality inspection stations have reported to the media the problems of printing textbooks with light paper. Li Jiaxiang, an expert in the printing industry, once said in an interview that the name of the light-weight paper specification is light-weight paper. The original intention of using light paper is to reduce the weight of schoolbags for primary school students, but because the quality of light paper on the market now is not up to standard, so that the weight is not reduced, but the volume is increased

according to the documents issued by provinces (autonomous regions and municipalities), all regions usually use 50g light paper, 60g light paper and 90g Yaguang light paper to replace 70g double offset paper, 80g double offset paper and 105g ordinary coated paper respectively. But Li Jiaxiang said that in fact, the gram weight of light paper used in some textbooks is not lower than the double offset paper it replaces, and some are even thicker than the double offset paper with the same gram weight. Therefore, he does not advocate the use of light paper in the printing of textbooks

in an interview with this newspaper, the staff of printing product quality inspection stations in some regions also said that the quality of imported light paper is better, the grade of domestic light paper varies greatly, and the weight of light paper used in teaching materials does not meet the standard in the process of quality inspection

in addition, the printing quality of light paper is not as good as double offset paper, but the printing cost is higher than double offset paper, so printers prefer to use double offset paper. Sun Liang, general manager of Jiangxi education printing industry Co., Ltd., and Zhang Renhui, deputy director of Hebei Xinhua Printing No. 2 factory, said in an interview with China publishing news that due to the uncoated and rough surface of light paper, the ink absorption during printing is larger than that of double offset paper, which also increases the friction of plates, so the amount of ink and plates is larger than that of double offset paper. In addition, if the grade of light paper is not enough, its printing effect is not as good as double offset paper

new phenomenon: natural color paper began to be used for textbook printing

when light paper became the mainstream paper for textbook printing, natural color paper began to be used for textbook printing this year. Like light paper, natural color paper also has the advantages of protecting eyesight and the environment. This kind of paper takes crop straw as the main raw material, does not add bleach and fluorescent agent in the production process, and its color is light yellow. The printed matter made of it will not cause visual fatigue after long-term reading

according to the report of Dazhong, the college entrance examination papers in Shandong Province were printed on natural color paper for the first time in 2010, and all primary school Chinese Textbooks in Guizhou have been printed on natural color paper; Jiangsu, Jiangxi, Anhui, Shanxi and other provinces' textbook and teaching auxiliary book publishing institutions have also purchased natural color paper from a group in Shandong

natural color paper was known to the world as a licensed paper for the Shanghai WorldExpo in 2010. Shanghai also chose natural color paper during the environmental protection printing experiment of teaching materials this autumn. According to the Shanghai Municipal Publishing Bureau, under the joint guidance of the Shanghai Municipal Education Commission and the Shanghai Municipal Publishing Bureau, the education press of Shanghai Century Publishing Co., Ltd. and Shanghai Zhonghua Printing Co., Ltd. printed two autumn textbooks in June this year, using natural color paper, soybean ink and environmental friendly glue: Labor Technology (grade 2 of high school) and sports and fitness (Grade 6). The printing volume of the former is more than 7000; The latter has a print volume of 15000 copies and is a recycled textbook

general trend: the cover film coating of teaching materials is gradually changed to glazing

about half of the country has changed the cover film coating process of primary and secondary school textbooks to glazing process, because it is more environmentally friendly. Li Jiaxiang, a printing expert and former Secretary General of the National Printing Standardization Technical Committee, said in an interview

interviews in some regions also confirmed this statement. Zhang Renhui, deputy director of Hebei Xinhua Printing No. 2 factory, said that in the past two to three years, the covers of Hebei teaching materials have all been UV polished and printed, and no longer covered with film. Wang Keping, deputy director of the textbook publishing center of times publishing media Co., Ltd., said that the company undertakes the printing of more than 90% of Anhui's textbooks. Since the spring semester of this year, all the textbooks printed by the company have been changed from film coating to environmentally friendly glazing technology. Wang Keping said that as a listed company, time publishing media Co., Ltd. not only requires high quality, but also pursues environmental protection when printing textbooks, and changes the coating process to glazing process. In the future, the company will gradually promote environmentally friendly ink and hot melt adhesive when printing textbooks. According to reports, because the textbooks are no longer covered with film, the company has eliminated the original coating equipment and invested millions of yuan to purchase glazing equipment

expert language: protecting the environment is worth promoting

for replacing the film covering process with glazing process, Li Jiaxiang believes that this is worth affirming, because it is more environmentally friendly

after the cover of the textbook is covered with film, the color graphic cover can be protected, so that the cover is not easy to be worn, but the coating will cause environmental pollution

Li Jiaxiang said that the plastic film covered by the cover is non degradable, which will produce white pollution. At the same time, the adhesive used in the film covering contains substances harmful to human body, so the film covering process is not environmental friendly. He said that in recent years, foreign countries have used degradable materials to cover films, but the cost is high

after the coating is changed to glazing, it can basically meet the wear resistance requirements of teaching materials. Li Jiaxiang said. He analyzed that generally, the use cycle of books is relatively long, so the cover film is more wear-resistant. However, the use cycle of teaching materials is not that long, usually half a year to a year, and the glazing process can meet this requirement

glossing the cover not only helps protect the environment, but also improves production efficiency. Li Jiaxiang said that the cover polishing, especially UV polishing, makes the textbooks basically recyclable except hot melt adhesive. In addition, the printing efficiency of glazing process is also relatively high. Because there is a UV curing factor in the glazing oil, it can be cured after a few seconds of UV irradiation, and the coating needs to be baked for a long time with infrared ray

new phenomenon: Shanghai experimented with flexographic printing instead of offset printing

textbook printing usually uses offset printing, because offset printing is suitable for mass printing, with high speed, low cost and high quality. However, in Shanghai, an experiment of printing primary and secondary school textbooks with flexographic printing instead of offset printing is under way. This is because flexo printing is known as the most environmentally friendly printing method. Modern flexo printing can use environmentally friendly water-based ink and UV ink, which can greatly reduce the pollution caused by ink

it is reported that about 30% of newspapers in the United States use flexo printing, about 14 major newspapers in Europe use flexo printing, and about 25% of newspapers in Italy use flexo printing. In China, flexographic printing is commonly used in packaging and printing, especially in food packaging and drug packaging with high safety requirements, but its application in publication printing is almost blank

this year's government work report of this experiment has repeatedly mentioned that private enterprises and private economy are the two textbooks of new century English published by Shanghai Foreign Language Education Press. The chief of the publishing section of the press said that the experiment is currently in progress. Because the way of flexographic plate making is different from offset plate making, the result of flexographic proofing is not as good as the effect of offset printing before, so the printing factory is making plates again. In addition, replacing offset printing with flexographic printing also faces problems such as long printing cycle, high plate making cost, unsuitable printing equipment and so on

zhoujianping, director of the printing management office of Shanghai Publishing Bureau, revealed that although the current experiment has encountered some problems, the experiment on environmental friendly printing of teaching materials will continue, and some printing equipment manufacturers have indicated that they can develop and produce flexographic printing equipment for printing teaching materials