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Since the fluorescent color Photo-Stability is poor than the non-fluorescent, after which simulate sunlight exposure, dyeing base damage and shade change situations in this article will be quantified and provide Related color measurement data, the impact of the rating, as well as subsequent adjustments related to the use of a dye or UV absorber formulation improvements, provide reference.
We use common market for PET and Nylon material, in three basic colors as fluorescent dye, using AATCC 16 color fastness standards for testing, and then use Datacolor spectrometer, the reflection rate before and after the light fastness and CIE ΔE value were compared.
There were no fluorescent and fluorescent colors, fluorescent colors light fastness have significantly poorer than those without fluorescent color, which is due to fluorescent UV light is absorbed to increase its reflectivity, and its brightness will generally rise , but by excessive exposure to UV light, the original trans lumiphore will be converted into the cis and lose its ability to photochromic, so after sample exposure significantly compared with that before fading scenario.
In the fluorescent color which, since the Photo-isomerization factors such fluorescent whitening agents absorb ultraviolet light emitted conversion 300-400 nm 420-450 nm long wavelength of visible light (blue group purple zone), which firefly optical brighteners in an aqueous solution of exposure to sunlight, or worse still, under ultraviolet light, the fluorescence of a trans will turn into non-fluorescence of cis-structure.
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