Answer:
This marking uses 3M Diamond Grade Series 983 microprismatic full-cube optics certified to ASTM D4956 Type VIII (Type 8), built with pre-sealed edges and a PVC-free, solvent-free adhesive construction.
The 3M Series 983 yellow conspicuity tape is engineered using full-cube microprismatic optical elements formed in a transparent synthetic resin. Key construction and optical characteristics include:
- Optical Performance: Meets ASTM D4956 Type VIII (Type 8) high-intensity retroreflective specifications, providing superior wide-angle retroreflection in both dry conditions and heavy rain.
- Edge-Sealed Construction: The continuous tape features pre-sealed edges that block moisture, road dirt, and grime from entering the prismatic lens cells.
- Substrate & Adhesive: Non-metallic, PVC-free composition using high-tack solvent-free pressure-sensitive adhesive backing.
- Environmental Durability: Formulated to resist road debris, fuel vapors, occasional chemical spills, and industrial weathering.
