Throughout the years, the recycling industry has invented variants of the symbol to distinguish each category of recycling (paper, plastic, glass, metal, etc). Attempting to prevent confusion between the various types of recycling, they have tried to standardize each kind. However, there are still many deviations of the recycling symbol, both regulated and not, which can make it even more complicated.



The American Paper Institute (API) promoted four different variations of the same mobius loop to distinguish different recycling purposes. The solid black mobius loop or one with simply a white outline was used to identify material that was recyclable. The other two kinds, either black on white or white on black, had the mobius loop surrounded by a circle. They were used for material that was made of recycled paper, with the white-on-black version to be used for 100% recycled paper and the black-on-white for a mixture of recycled and non-recycled paper. The percentage of recycled paper that is used in the material is often written in the center. Recycled paper, as well as containing recycled paper, can be recycled as well, often reused in another product whose material requirements are less rigid.

Although most glass can be recycled, the Glass Packaging Institute (GPI) created a symbol for use on recyclable glass packaging to encourage the recycling of the product after consumption. And in recent years, the 100% Recycled Paperboard Alliance has developed a symbol of their own, signifying the material of the product has been made from 100% recycled matter. This symbol informs users that not only was the paperboard carton constructed with recycled material, but also reminds them that it still recyclable.

Although there are many variations of the mobius loop recycling symbol, it is extremely important that each kind can be distinguished and recognized. And, while it is the recycling industry's responsibility to remind consumers, it still is your duty to take action and recycle.