PVC 料是否禁用在食品包裝, PET 是否安全在食品包裝, 有否顏色? A PET 同 R PET 有何分別, 請指教

Both PVC and PET can be used for food packaging applications. The issue is whether they contains prohitbitive additive and their amount of migrant to foods. There are regulations on food packaging applications in different countries. Many food companies are switching to PET due to its recyclebility and lighter weight. Will heating release toxic chemicals? It depends on the temperature and the composition of the final product.

PET can add color additive.

A-PET is PET流延片材，用於生產和食品直接接觸的包裝材料如飲用水杯、軟食品的托架等。
R-PET is recycle PET (PET回收料).

You can also have a look on the reference article.