VANCOUVER—  Cellulotech, a Canadian materials science company, claims to have developed a food contact-approved process that makes paper products resistant to water, grease, oxygen, and vapour – all while having no effect on recycling and composability. Chromatogeny is a green chemistry reaction that grafts long-chain fatty acids on different substrates such as paper, starch, PVOH, minerals, etcetera to make them superhydrophobic while preserving their repulpability and compostability properties. Chromatogeny is very different from a coating - it is a chemical reaction. It are not adding a layer of a distinct material upon the surface of a substrate, but it generate permanent ester bonds onto its whole specific surface area. Chromatogeny not only has the potential to solve a lot of issues faced by the packaging industry in terms of costs and sustainability, but also to expand the use of paper. In food packaging, grafted PVOH could replace PE coatings in single-use food packaging such as paper cups,grafted cardboard for frozen foods,make corrugated cardboard superhydrophobic ,labels can be used as a repulpable release paper. It is already approved for food contact in some jurisdictions.