Purina One
What is the meaning of “mass balance approach”?
The "mass balance" refers to mixing recycled plastic (using chemical process to make it usable for food contact) with virgin plastic during the manufacturing process of new plastics.
But we cannot tell exactly what quantity of recycled plastic is used in a specific bag. We can only tell that a targeted quantity has been allocated to that bag. In other words, we can tell that a defined quantity of recycled plastic is used to produce a group of bags, but each bag receives a different quantity of recycled plastic.
The “mass balance” is similar to when you buy “green” electricity. Although you cannot be certain that the electricity you buy/use at home is directly from renewable sources, your overall electricity usage does contain green energy (and that quantity increases as the green energy demand increases).
To find more, please visit website https://www.purina.co.uk/our-impact/sustainability/how-to-recycle-our-packaging