SKULL 16x20" Matte Vertical Poster | Art by Joe Bloch (creativebloch.com) Made with museum-grade paper (175gsm fine art paper), these posters translate artwork into exquisite real life décor. Each poster is printed with top-tier pigmented archival inks for a stunning end result. .: Made with museum-grade archival paper (175gsm) for excellent printing fidelity and vibrant color reproduction. .: For indoor use only