After six years of development, green concept deeply rooted, green Printing has become the development consensus and conscious action of the upstream and downstream of the industry chain and the whole industry. From November 27th to December 1st, the annual Green Printing Promotion Week was held. In order to better promote the green printing concept to readers, this edition selects 8 basic knowledge about green printing, and popularizes green printing knowledge points for readers through question and answer.
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.
Second, 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 raw and auxiliary materials?
• Green printing requirements for varnish are water based or light cured varnish.
· 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 no phthalate esters to be added to inks, varnishes, blankets, and 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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