valokestävyyden
Valokestävyys, often translated as lightfastness or durability to light, refers to the ability of a substance or material to resist fading or degradation when exposed to light. This phenomenon is particularly important for materials like dyes, pigments, inks, plastics, and photographic materials, which are often displayed or used in environments where they are subject to sunlight or artificial illumination.
The degree of valokestävyys is typically measured on a scale, with higher numbers indicating greater resistance
Factors influencing valokestävyys include the intensity and wavelength of the light, the duration of exposure, the