Formlabs Grey V5 Resin (Form 4) 1 LGrey Resin is an exceptionally versatile General Purpose Resin, offering an optimal balance of fast print speed, high accuracy, presentation ready appearance, strong mechanical properties, and an easy, reliable workflow. Create parts that are stiff and strong with a surface finish that rivals injection molding. Grey Resin has a rich, matte color that captures fine features accurately. Grey Resin V5 is a new material formulation that leverages the Form