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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.

Photochromics, Photochromatic Inks, photochromic dyes

No Stimulus UV Stimulus @ 60% UV Stimulus @ 100%
Photochromics, Photochromatic Inks, photochromic dyes Photochromics, Photochromatic Inks, photochromic dyes Photochromics, Photochromatic Inks, photochromic dyes
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Printcolor Products
Clear Card Products
Decorative Materials & Inks
   Sands Effect® Materials
       Janus Effect® Inks
       Fluorescent Pigments & Inks
       Photochromic Materials
       Pearlescent Materials
       Glitter Materials & Inks
       Color Shift Pigments & Inks         
Dimensionals by Sands®             
Crumpled Aluminum
Scratch and Sniff Inks


EZ-Texture Inks
Metallic Inks
Non-Metal Metallic Solvent Screen Inks
High Transparent Inks
392 Series spectraCARD™ Inks
Thermochromics
Photoluminescent Materials
Metalized Holographic Foil
  & OVD Prelam Materials
Varnish/Miscellaneous

Catalog Number Product Name Application Abs. Max. (nm)
Yellow photochromic dye (optical grade) Photochromic Dye
Orange photochromic dye (optical grade) Photochromic Dye
Red photochromic dye (optical grade) Photochromic Dye
Blue photochromic dye (optical grade) Photochromic Dye
Royal Blue photochromic dye (optical grade) Photochromic Dye
Violet photochromic dye (optical grade) Photochromic Dye
Photochromic Dye Kit Photochromic Dye
Yellow Photochromatic Ink Photochromic Ink
Magenta Photochromatic Ink Photochromic Ink
Violet Photochromic Ink Photochromic Ink
Blue Photochromic Ink Photochromic Ink
Red/Blue Bi-Photochromic Ink Photochromic Ink
Photochromic Pigment Kit Photochromic Pigment
Yellow photochromic pigment Photochromic Pigment
Orange photochromic pigment Photochromic Pigment
Red photochromic pigment Photochromic Pigment
Blue photochromic pigment Photochromic Pigment
Royal Blue photochromic pigment Photochromic Pigment
Violet photochromic pigment Photochromic Pigment

 
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