Yes, polycarbonate can yellow over time due to exposure to UV light and certain environmental factors.
Lexan is a name brand of polycarbonate plastic. Sort of like Xerox has come to mean making a copy on a photocopier. Polycarbonate will lose many beneficial characteristics if left in sunlight extensively. It has a blue tint that would tend to cancel some yellowing effects of sunlight but will turn yellow if left in sunlight over a long period of time. Other types of plastics turn yellow in sunlight as well. No sunlight, no yellow. It also becomes brittle and generally weaker over time when exposed to sunlight. This type of plastic has been used in bullet proofing cars. However, over a period of time in sunlight, the plastic must be replaced if it is to continue stopping bullets. I saw a .44 magnum cal. bullet imbedded in a 1 inch thick piece of poly-carbonate years ago. The inside surface had a slight dimple. Polycarbonate does not fracture or crack if in good condition (no sunlight).
are there any health concerns with black deterating polycarbonate sheeting
Yes, polyurethane can yellow over time due to exposure to light and heat.
Yes, polyurethane can yellow over time due to exposure to light and heat.
Yes, urethane can yellow over time due to exposure to light and air.
How is polycarbonate made How is polycarbonate made
Yes, polyurethane can turn yellow over time due to exposure to light and oxygen.
Yes, oil-based polyurethane can yellow over time due to exposure to light and air.
Yes, silver can tarnish and turn yellow over time due to exposure to air and certain chemicals.
The Panasonic counter top microwave oven in white, should not yellow over time. Anything white if not cleaned properly does stand the risk of discoloring.
Whether glass or polycarbonate is better depends on the application, as each has its strengths and weaknesses: ✅ Glass – Best for Clarity & Scratch Resistance Pros: Excellent optical clarity (crystal clear) Highly scratch-resistant UV stable (won’t yellow over time) More rigid and aesthetically refined Cons: Brittle – can shatter or crack on impact Heavier than polycarbonate Best for: Windows, aquariums, high-end displays, and places where clarity and scratch resistance matter most. ✅ Polycarbonate – Best for Impact Resistance & Flexibility Pros: Extremely impact-resistant (250x stronger than glass) Lightweight Shatterproof Easy to cut and shape Cons: Prone to scratching unless coated Can yellow over time if not UV protected Best for: Safety glazing, eyewear lenses, riot shields, greenhouse panels, and areas where durability and safety are key.
Polycarbonate panels are used as substitutes for glass and plastic such as in windows. You can purchase polycarbonate panels from retailers such as Amazon.