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Recycling codes are used to identify the material from which an item is made, to facilitate easier recycling or other reprocessing. Having a recycling code, the chasing arrows logo or a resin code on an item is not an automatic indicator that a material is recyclable but rather an explanation of what the item is. Such symbols have been defined for batteries, biomatter/organic material, glass, metals, paper, and plastics. Various countries have adopted different codes. For example, the Table below shows the polymer resin codes (plastic) for a country. In the USA there are fewer as ABS is grouped in with other in group 7. Other countries have a more granular recycling code system. For example, China's polymer identification system has seven different classifications of plastic, five different symbols for post-consumer paths, and 140 identification codes〔Standardization Administration of the People’s Republic of China (SAC) GB16288,2008. Marking of plastics products. Chinese Standard Publishing House, Beijing; 2008.〕 The lack of codes in some countries has encouraged those who can fabricate their own plastic products, such as RepRap and other prosumer 3-D printer users, to adopt a voluntary recycling code based on the more comprehensive Chinese system.〔Emily J. Hunt, Chenlong Zhang, Nick Anzalone, Joshua M. Pearce, (Polymer recycling codes for distributed manufacturing with 3-D printers ), ''Resources, Conservation and Recycling'', 97, pp. 24-30 (2015). DOI:10.1016/j.resconrec.2015.02.004 〕 ==See also== *Resin identification code *Japanese recycling symbols *Waste hierarchy *Waste management *Food safe symbol *Bag It (documentary) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Recycling codes」の詳細全文を読む スポンサード リンク
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