Photo Slate, 20*20cm 1 Piece Personalized Customized Photo Frame. 20 x 20cm. Perfect personal gift for Father's Day, Mother's day, Business. Sublimation slate is a kind of decorating element for interior application, such as home décor, bars, café, and restaurants. It is made from rocks and coated with sublimation coating on the front surface where allows being printed with personalized artworks.