| Labels intended for outdoor use need to be durable and have the ability to hold up to a wide variety of different weather conditions. Vinyl and polyester are top material choices for outdoor conditions. The matte finish on the vinyl media helps reduce glare, while the polyester's glossy finish creates a sharp, shiny image. Bumper stickers are, typically, made of vinyl. Often outdoor labels or industrial labels require a UL listing. UL recognition ensures that a device, system or material has been tested and certified by this private organization to meet specific safety standards. The three primary tests to determine film and adhesive performance are a heat age test, outdoor weather ability, and exposure to various solutions. CSA is another testing organization devoted to establishing standards for safety, quality and performance. Unlike UL, which recognizes a substrates adhesion to specific individual surfaces, CSA recognizes nine substrate groups for applied labels. Silk screening or special inks may be required to help with the fading of inks. |
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