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Reflective Radium Sheet Factory

Reflective Radium Sheet Factory


How do I determine the best retroreflective sheeting for my signs?


Many traffic signs, parking signs, and safety signs have the option of reflective aluminum as a sign material. Reflective aluminum, like coated aluminum, will not chip, crack, or rust, and also adds increased visibility at night and in low light situations.


Retroreflectivity describes the efficiency of a material to redirect light back to its source, which when applied to signs, makes seeing the message easier. All regulatory traffic, traffic warning, guide signs, and object markers are required by the Federal Highway Administration to be retroreflective.


With the benefit of increased visibility, it’s good to know about the different types of retroreflective sheeting that Dingfei Reflective offers on our signs before selecting one for your needs.



There are three types of retroreflective sheeting that Dingfei Reflective uses: engineering grade, high intensity prismatic, and diamond grade. Each type of sheeting provides a different level of reflectivity and durability.


Each reflective sheeting type offers a different level of retroreflectivity. Choosing the right sheeting makes a difference in a driver’s ability to recognize a sign. Drivers will recognize brighter sheeting sooner from a farther distance. In addition to reflective sheeting, we offer protective overlay film to help protect your sign. A description of the four sheeting types we offer:


Engineer Grade Prismatic (EGP) - typically used in areas of low traffic volume, low speeds, and minimal competing light. Signs that commonly use Engineer Grade are parking signs and no trespassing signs. Engineer Grade meets ASTM D Type I specifications for retrorefelctivity.


High Intensity Prismatic (HIP) - HIP provides higher levels of retroreflectivity versus engineer grade and standard high intensity. Where high intensity uses encapsulated glass beads, HIP uses prismatic technology to provide increased retroreflectivity levels four times brighter than engineer grade. HIP is effective in both well-lit areas and in areas with low levels of light in the vicinity. Signs that commonly use HIP are stop signs, speed limit signs, and crosswalk & pedestrian warning signs. HIP meets ASTM D Type III & Type IV specifications for retroreflectivity and is backed with a 10-year warranty.