Card Materials > Decorative Materials & Inks > Sands Effect® Materials > Photochromic Materials
H.W. Sands’ Photochromics reversibly alter their color upon exposure to ultraviolet sources. These chameleon-like dyes respond to natural solar irradiation as well as artificial sources such as 365 nanometer "black light." When sunlight or ultraviolet (UV) radiation is applied, the dye becomes excited and the molecular structure is changed allowing a color to appear. When the stimulus (sunlight/UV) is removed, the dye will return to a state of rest, which is its colorless form. Photochromic molecules are not reactive in their crystalline state and need to be dissolved in a solvent or polymer to function. No Stimulus UV Stimulus @ 60% UV Stimulus @ 100% View TDS For further details, please contact our Customer Satisfaction Team for assistance
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