450000 green books will be welcomed in the new sem

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The new semester of the year of the horse will welcome 450000 green books

[ppzhan Abstract] in recent years, environmental issues have been developing continuously. As a part of the contribution of environmental issues, the printing industry is being asked to develop in the direction of green environmental protection. It is reported that in the new semester after the Spring Festival of the year of the horse, about 450000 flexible ink printed textbooks for primary and secondary schools will be delivered to the children

with the increasing awareness of environmental protection, green environmental protection has become the development goal of the industry. After nearly three years of development, green printing has achieved initial success in China. It is reported that the goal in 2014 is to further deepen the promotion of green printing. All major printing enterprises are seeking green certification to effectively promote green printing. Shanghai printing group said that in the new semester after the Spring Festival of the year of the horse, about 450000 flexible ink printed primary and secondary school textbooks of six varieties will be delivered to children. This is not a greener batch of textbooks, and certainly not the next batch

On the morning of January 8, in the workshop of Shanghai Xinhua Printing Co., Ltd. affiliated to Shanghai printing group located in Baoshan Gucun Industrial Park, I picked up a textbook of labor technology for the second semester of grade 5 of primary school. I felt that there was no smell of oil and ink, but a fresh smell of books

don't underestimate this textbook. It is printed with more green and environmentally friendly flexible ink. The environmental protection standard of this printing method is higher than the green printing certification standard launched by relevant national departments in 2010. So, what is flexo ink printing? What is the difference between it and the current common offset printing

the answer is different raw materials and processes. Gongrenzhuo, President and engineer of flexographic printing branch of China Printing Technology Association, introduced that the ink, paper, fountain solution, alcohol, adhesive, film coating, powder spraying, cleaning agent and various additives used in traditional printing have environmental pollution problems of varying degrees in the whole production and application links. Flexographic ink printing is a green printing process that is environmentally friendly and can implement large-scale production. It uses a new type of water-based ink. The water-based ink is completely free of harmful volatile gases and heavy metals, non-toxic and harmless; Dry plate washing method is adopted, and the waste stained non-woven fabric can be reused after treatment, without generating waste harmful to the environment; At the same capacity, the equipment has lower energy consumption, and will not produce waste liquid such as fountain solution and car washing water, and there are no powder spraying and other materials that may affect the health of operators and users

flexographic printing, offset printing, gravure printing and silk printing are the four most popular printing methods in the world. From the development trend of printing, among the printing methods of packaging products, flexible ink printing accounts for 39% of the market share, and offset printing ranks second with 24%

the cost is huge.

there is no precedent in the world for textbooks to use flexible ink printing. There is no ready-made equipment and process. It is difficult to grasp the printing adaptability of raw and auxiliary materials. There are many uncertain factors for the printing quality to approach or meet the existing offset printing standards. However, the mountain in front of greener textbooks is still a cost

the cost here includes two aspects, one is the cost of plate making, and the other is the cost of paper. The relevant person of Shanghai printing group has calculated an account: Taking the printing of 10000 copies of a book as an example, if the traditional offset printing is used for plate making, the plate making fee per printed sheet of the inner page is about 0.043 yuan, while if the flexo printing is used, the plate making fee per printed sheet of the inner page is about 0.9828 yuan. In this case, only when the printing volume increases, cost dilution becomes possible. After that, the balance they found was that when the volume of printed books reached 1.15 million, the allocation cost of flexo ink printing plates was the same as that of traditional offset printing plates. Of course, after Shanghai printing group recently introduced and put into operation its own plate making process system, the cost of flexo plate making has decreased by about 50%, making the balance point between flexo printing and offset printing down to more than 500000 copies. However, in most cases, the printing volume of general books will not reach this level

in addition, due to the high requirements on the paper surface in the printing of flexible ink textbooks, enterprises currently use paper customized to paper mills, and the unit price per ton is 300 yuan higher than the paper used for offset printing, equivalent to an increase of 5.77% in the paper cost

however, there is no special pricing system for flexo ink textbooks

in June, 2010, Shanghai printing group started the flexographic printing experiment of primary and secondary school textbooks, and successfully printed the fourth grade primary school textbook English (New Century Edition) by using a narrow width flexographic printing machine. Over the past three years, more than 3 million textbooks of 44 kinds have been printed with flexible ink. However, compared with the annual printing volume of 100million textbooks and teaching aids in Shanghai, this is still a small head. At present, the development of the granulator industry in small and medium-sized enterprises in the city also abides by this law. The printing method of students' exercise books has been changed from traditional offset printing to flexible ink printing

pursuing environmental protection is still on the way

flexible ink printing is more environmentally friendly and greener, but it is still on the way to continuously improve the process. In the production workshop, I saw a machine. The staff called it DuPont Saili fast solvent-free thermal dry plate making system

the slightly complicated name represents the unremitting pursuit of low carbon and environmental protection in the flexo printing industry. At present, the flexo printing industry has launched three environmentally friendly plate washing technologies: chlorine free plate washing solution technology, dry thermal plate washing technology and water or weak alkali plate washing technology

Saili fast solvent-free thermosensitive dry plate making technology no longer requires the traditional solvent for plate washing and drying, and there is no solvent in the whole production process, so it is called dry; The plate is heated with non-woven fabric to erase the unexposed part, so it is called thermosensitive. The external audit team led by fivewin DS world sustainable development experts recognized that flexographic printing with this technology can reduce carbon emissions by 60% compared with traditional solvent washing, while flexographic printing can reduce energy consumption and carbon dioxide greenhouse gas emissions by about 50% compared with gravure printing with another printing method

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