Photochromic Pigments - UMC

The photochromic pigments change color when exposed to sunlight/UV, and revert to their original color when the sunlight/UV is dimmed or blocked. After absorbing the energy of sunlight/UV, their molecular structure is changed, which causes their absorbed wavelength to be changed allowing a color to appear.

Color conversion from colorless to colored when excited by UV light:

Photochromic microencapsulated powder contains 2-5 % of photochromic dye and less than 3% of moisture, suitable for solvent/aqueous based ink/paint and plastic injection/extrusion. The average particle size is 3-10 mm.

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