There is no difference between PET and APET plastic. PET is a polyester, chemically known as polyethylene terephthalate. PET can be made from polymers arranged in two main ways; amorphous or crystalline. In fact, with one major exception, everything you touch is amorphous. Microwave food trays, when made from PET, are made from C-PET (crystalline PET). Essentially all clear PET, including polyester film and water bottles, is made from A-PET (amorphous PET), and in many cases, the “A” is simply omitted. The Möbius recycling symbol for polyester is PET with the number 1, so many people refer to polyester as PET. others prefer to be more specific, by indicating whether the polyester is crystalline C-PET, amorphous APET, recycled RPET or glycol-modified PETG. these are minor variations intended to simplify the processing of polyester for the intended end product, whether by injection molding, blow molding, thermoforming or extrusion, and finishing operations such as die-cutting. PETG is much more expensive and easier to die-cut than APET using conventional die-cutting equipment. It is also softer and more prone to scratching than APET. Converters who do not have the proper equipment to die-cut APET often use PETG because it is softer and more scratch-prone, so polyethylene masking (which is a thin “Saran wrap” type covering) is often used. This mask needs to be removed from one side during printing, but is usually left on the other side during die-cutting to prevent scratching. Removing the polyethylene mask is very time consuming and therefore more costly, especially when printing large quantities of paper. Many point-of-sale displays are made from PETG because their specifications are often heavy and difficult to die-cut. Another reason is that the polysilicon mask can be retained to protect the display during handling and shipping, and then removed when setting up the display. This is the main reason why many designers automatically specify PETG for point-of-sale displays without knowing whether APET or PETG is best suited for the intended end use or processing (printing, die-cutting, gluing, etc.). APET is typically available in thicknesses up to 0.030 inches, while PETG typically starts at 0.020 inches. There are other subtle differences between PETG and APET, and remembering the name can be confusing if you are not familiar with the pros and cons of how PET is manufactured, but it is safe to say that all of the above refers to polyester, and, from a recycling standpoint, they are both treated equally.