People often ask: What is fluorescent colorant? Will fluorescent colorants glow in the dark?
Fluorescent color paste is a pigment paste that emits fluorescent colors. The main raw material of fluorescent color paste is fluorescent pigments, which can generally be divided into inorganic fluorescent pigments and JI fluorescent pigments. Inorganic fluorescent pigments are also called luminous pigments (they can glow in the dark). JI fluorescent pigments (hereinafter referred to as fluorescent pigments) are also called daylight fluorescent pigments. After absorbing visible light and ultraviolet rays, their total reflected light intensity is higher than that of ordinary pigments. Creates very bright colors. For example, the reflected light intensity of fluorescent green is 3 times that of ordinary green pigment, and the color is bright and bright. Our fluorescent color paste is produced and processed using fluorescent pigments.
Fluorescent pigments are actually composed of fluorescent dye-coated resin. Most fluorescent dyes are basic dyes with low light fastness. When the fluorescent dye particles are coated with resin, they become granular fluorescent pigments. Resin is a carrier for fixing dyes! Traditional resin coating: p-toluenesulfonamide-formaldehyde-melamine, and benzinated melamine-formaldehyde resin resin systems are traditional fluorescent pigment carrier resins, but they contain formaldehyde and have poor heat resistance. They begin to change color above 130°C and will discolor at 180°C. It is extremely unstable at ℃; its light fastness is poor (about level 2); it is not friendly to the environment. Formaldehyde is released during production and use, and it is not environmentally friendly. As people’s requirements for fluorescent pigments continue to increase, various new carrier resins continue to emerge and are used in different fields. Fluorescent pigments prepared from polyacrylate resin have better light resistance, which is due to the weather resistance of polyacrylate resin itself, and micron-sized or nano-sized particles can be obtained through emulsion polymerization. Since polyacrylate resin does not contain Formaldehyde is widely used in fields with strict restrictions on formaldehyde content, such as textile printing, fluorescent ink, etc.
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