High Density Prismatic
Engineer Grade Reflective Sheeting typically meets ASTM D4956 Type 1 standards and is an enclosed film or lens using glass beads or prismatic optical technology. This material is specified for use on non-critical street and road signs such as parking signs or way-finding signs.
Physical Properties Fabrication Lines
The manufacture of prismatic Sheeting results in lines being present in the product. In prismatic Sheeting, these lines are slightly thicker than the seal pattern legs. Fabrication lines are noticeable in shop light but are not observable on the road, either in daylight or at night, under typical use conditions.
Adhesive Series 3930 Sheeting has a pressure-sensitive adhesive that is recommended for application at temperatures of 65ºF (18ºC) and higher.
High Density Prismatic Cutting
Series 3930 Sheeting may be cut into letters and shapes with heights of at least 3 inches and stroke widths of at least ½ inch. Smaller sizes are not recommended. Sealing the cut edges of Series 3930 Sheeting is not required.
Signs that require cleaning should be flushed with water, then washed with a detergent solution and soft bristle brush or sponge. Avoid pressure that may damage Sign faces. Flush with water following washing. Do not use solvents to clean Signs.
Nylon washers are required when twist style fasteners are used to mount Signs.
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