Detached sequin 1 (5 cm × 0.2 mm). Top: Reflective side, and a detail showing the presence of a thin silver layer in areas where the cellulose nitrate/Rhodamine B layer has been lost due to degradation. Center: Matt side, and a detail showing no similar silver layer. Bottom: Schematic diagram of the proposed layered structure of the sequins, where the top side is slightly more reflective, and the bottom side is more matt. Ruby Slippers from The Wizard of Oz used courtesy of Warner Bros. Entertainment Inc. TM and © Turner Entertainment Co.