Specifications include, but are not limited to: The sheeting types outlined are ASTM D-4956 type 1, type 4, type 9 and type 11. ASTM designation is provided as a means for differentiating functional performance and is not intended to be limitations or recommendations. The retroreflective sheeting must provide color and reflectivity both night and day upon contact with a light source when either totally wet or dry. The retroreflective sheeting must consist of white or colored sheeting with the property of a retroreflector over its entire surface and consists of elements embedded with a transparent plastic having a smooth, flat outer surface, which provides reflectorizing that produces a wide-angle retro reflectivity, and increases night visibility. Sheeting must be new material of good quality, flexible, of good appearance, free from tattered edges, cracks, and unnecessary materials. Retroreflective sheeting will meet the requirements of ASTM D-4956, and all requirements of the S.C Department of Transportation – 2007 Standard Specification Section 651 – Reflective Signing Materials. In case of conflict, these requirements of these Specifications will prevail. https://dc.statelibrary.sc.gov/handle/10827/31126