The AP1(Fusion) Square Corner Black Hard Card provides a little more flexibility than the the gold, but it is stiffer than the blue which makes it great for both flat and curved glass surfaces.
These AP1 cards are infused with slip agents to help them glide across their working surfaces.
This new improved design makes it easier to get into tight corners when bumping edges dry and when trimming film.
*Teflon slip tape on this hard card will prevent any scratch on the film or keep it sanded!*