November 30th, the first green The printing knowledge contest came to a successful conclusion. The success of this competition set off a wave of learning green printing knowledge in the national printing industry . Green printing has become the development consensus of the industry. In order to better promote the concept of green printing and popularize the knowledge of green printing, this article selects 8 related basic contents, readers can look at the degree of understanding of green printing through self-test.
1 What is green printing?
Green printing refers to the printing method that uses environmentally-friendly materials and processes, produces less pollution during the printing process, saves resources and energy, is easy to recycle and recycle after the printed matter is discarded, can be naturally degraded, and has little impact on the ecological environment. Green printing requires coordination with the environment, including the use of environmentally friendly printing materials, clean printing production processes, the safety of printed materials to users, and the recycling and recycling of printed materials, that is, the entire life of printed materials from raw material selection, production, use, recycling, etc. The cycle should meet environmental requirements.
2 What are the characteristics of green printing?
Decrease and moderate, non-toxic and harmless, non-polluting and pollution-free are the three main features of green printing. Reduction and moderation refers to the moderate printing of green printing under the conditions of information recognition, protection, convenience, sales, etc., with the least amount and the most simplified process; non-toxic and harmless means that the printed materials should not contain toxic substances. Or the content of toxic substances should be controlled below the relevant standards; non-polluting and pollution-free means that the environment should not pollute or cause pollution during the whole life cycle of printed products, that is, from raw material collection, material processing, manufacturing products, products. The use, waste recycling and recycling, until the final treatment of the entire process should not cause pollution to the human body and the environment.
3 What are the requirements for green printing on raw and auxiliary materials?
• Green printing requirements for varnish are water-based or light-curing varnishes;
• Green printing requirements for dusting are plant dusting;
• Green printing is required for the application of film-coated adhesives as water-based film adhesives;
• Green printing requires that no phthalate esters be added to inks, varnishes, blankets, or adhesives;
• Green printing should meet the GB/T24999 standard for whitening of paper; green printing should meet the GB/T18359 standard for paper whitening requirements for primary and secondary school textbooks;
• The limit of cyclohexanone in the limit of harmful substances in green printing products is ≤1.0mg/
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