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.
このインクは耐光性が高く、日光に当たっても色あせしにくい。
This ink has high light fastness and resists fading even when exposed to sunlight.
耐光性試
Light resistance testing showed that this fabric can withstand long-term UV exposure.
Refers to weather resistance (including light, moisture, temperature), a broader term than 耐光性.
Compound of 耐 (resistance) + 光 (light) + 性 (property). A modern technical coinage following the pattern of other -耐性 compounds.