耐たい光こう性せい

noun

light resistance; light fastness

Technical term used in materials science, textiles, and printing to describe how well a material resists fading or degradation from light exposure.

• このインクは耐たい光こう性せいが高たかく、日にっ光こうに当あたっても色いろあせしにくい。

  This ink has high light fastness and resists fading even when exposed to sunlight.

• 耐たい光こう性せい試し験けんの結けっ果か、この布ぬの地じは長ちょう時じ間かんの紫し外がい線せんに耐たえられることがわかった。

  Light resistance testing showed that this fabric can withstand long-term UV exposure.