While TR90 is a durable and versatile material for eyeglass frames, proper care and handling are still necessary to maintain its performance and longevity.
Though TR90 has better heat resistance than some plastics, prolonged exposure to very high temperatures (e.g., leaving frames in a hot car dashboard, near open flames, or on a heated surface like a hair straightener) can cause slight warping or softening over time. This may alter the frame’s shape, affecting fit or alignment.
While TR90 is more resistant to everyday substances like sweat or mild cleansers, it can still be damaged by harsh chemicals, including:
Acetone, paint thinners, or industrial cleaning agents may degrade the material’s surface or cause discoloration.
TR90’s flexibility is a strength, but excessive or repeated bending (e.g., twisting temple arms beyond their natural range) can gradually reduce its "memory" properties. Over time, this may lead to permanent warping or weakened structural integrity. When adjustments are needed, it’s best to have a professional optician handle them.
Use a soft, lint-free cloth with mild soap and lukewarm water to clean TR90 frames. Avoid abrasive materials (e.g., scouring pads) or harsh detergents, as they can scratch the surface or dull finishes.
When not in use, keep TR90 frames in a protective case—preferably a hard-shell case—to prevent accidental pressure, bending, or scratches from contact with other objects (e.g., keys, cosmetics) in a bag or pocket.
While TR90 holds color well, prolonged exposure to intense UV rays (e.g., constant outdoor use without protection) may cause gradual fading in some dyed or coated variants. Consider using a case when not wearing them outdoors for extended periods.
Check for Fit Regularly: Though TR90 is resilient, daily wear can cause minor shifts in fit (e.g., temple arms loosening). If the frame feels loose or misaligned, consult an optician for professional adjustment—avoid bending or twisting parts yourself, as improper handling may cause damage.
By following these guidelines, you can maximize the lifespan of TR90 eyeglasses and ensure they remain comfortable, functional, and visually intact.
