How Are Fluorescent Pigments Made?
Fluorescent pigments are created by dissolving fluorescent dyes into a resin carrier, then grinding the mixture into a fine powder. This process is key because fluorescent dyes alone do not fluoresce; the dissolution and grinding are essential for their luminescent properties.
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Dye Selection: The process begins with selecting the appropriate fluorescent dye. These dyes possess specific energy levels enabling fluorescence.
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Resin Dissolution: The chosen dye is dissolved in a thermoplastic or thermoset resin. This resin acts as a carrier, holding the dye particles in place within the final pigment. The type of resin can influence the pigment's properties like its durability and application method.
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Grinding & Milling: Once dissolved, the mixture is meticulously ground into a fine powder. This process is crucial, transforming the dissolved dye into a usable pigment. The finer the grind, the better the dispersion and color intensity in the final application.
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Quality Control: Rigorous quality control measures ensure consistent color, particle size, and fluorescence intensity.
Types of Fluorescent Pigments
Fluorescent pigments can be categorized in several ways:
- By Resin Type: Thermoplastic or thermoset resins.
- By Application: Paints, inks, plastics, and textiles.
- By Light Source: Daylight fluorescent pigments show intense color in daylight and fluoresce under UV light.
Different applications require different resin types and particle sizes, influencing the pigment’s overall performance and final appearance.
Examples of Fluorescent Pigments in Use
- DayGlo pigments: A historically significant example of fluorescent pigments, known for their vibrant and intense colors.
- Kremer Pigments: Offer various fluorescent watercolor sets and color pastes, demonstrating the versatility of these pigments in different artistic mediums.
The process ensures that the fluorescent dye particles are evenly dispersed, allowing for effective light absorption and re-emission, resulting in the characteristic bright, vibrant colors of fluorescent pigments.
