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Updated Lightfastness Standards Challenge Outdoor Sublimation Prints

Updated lightfastness standards from ASTM and ISO are setting higher requirements for outdoor printed textiles, challenging sublimation prints used in flags, แบนเนอร์, and awnings. The new standards require 2–3 years of outdoor durability (fading less than 20%) under typical sunlight exposure. Many standard sublimation inks, especially lighter colors, fade faster when exposed to UV. ใน […]