X FAST provides all the benefits of gelatin while benefitting from the  patented CURADUO® technology by XpectINX®. This results in up to 33 % faster UV crosslinking, and therefore a reduced printing time. Based on gelatin derived from natural collagen which is modified with photo-crosslinkable functional groups. In the presence of the supplied XL crosslinker, it can be crosslinked with unprecedented efficiency. It resembles the natural ECM even more, and is characterized by high cell viabilities.