In the production of white opaque biaxially oriented polyethylene terephthalate (BOPET) film, it is important that the minerals have good dispersibility to avoid filter clogging and film breakage. Originally, minerals with a very high specific density and carbon footprint were used. However, with OmyaPET, films with a lower density and improved carbon footprint can be produced without compromising film manufacturing process performance. Thanks to OmyaPET, it is possible to produce BOPET films with identical opacity but at lower density.