Why do PLA products have recycling symbols 7 and 00?

We class all “other” plastics as class 7. This class includes a number of petroleum-based plastics that are not considered mainstream, and they are bundled into this one recycling class. The problem with placing PLA in this mix is that PLA is not petroleum-based and recyclers do not want it bundled. Yet PLA is still seen as an “other” plastic so it is classed as 7. Using 00 is essentially stating that PLA is not petroleum-based so a separate class should be used. In some parts of the world PLA is used for making many different products that will not be contaminated with food waste(3D printers for example use PLA). In these instances, PLA can be, and sometimes is, recycled and not turned into compost.

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