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The Chemistry and Physics of Special-Effect Pigments and Colorants for Inks and Coatings

SpecialChem / Jul 23, 2003

# Each specialty colorant has a specific attribute that makes them stand out when compared to regular colorants and pigments. To be able to describe these attributes, the following definitions must be understood.1 Luminescence: Fluorescence and phosphorescence. # Luminescent Colorant: A material that emits light (visible, IR or UV) upon suitable excitation, without becoming incandescent. # Excitation: A means of causing a luminescent colorant to emit light. # Fluorescence: The emission of light by a luminescent pigment under excitation (e.g., daylight fluorescent). # Phosphorescence: The emission of light by a luminescent pigment after excitation has ceased (e.g., glow-in-the-dark). # Thermochromic: Reversibly altering color upon exposure to a heat source. # Photochromic: Reversibly altering color upon exposure to a uv rich light source. There are many forms of energy that selected luminescent pigments can absorb and convert to luminescence, such as radioactive (radioluminescence); X-ray.

1 Comments on "The Chemistry and Physics of Special-Effect Pigments and Colorants for Inks and Coatings"
Mukund P Jul 12, 2018
Great article

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