Definition of fluorescent dyes:
Fluorescent dyes are special dyes that absorb light (especially light that we can see with our naked eyes), then convert this energy into brighter light and emit it again - "fluorescence". Fluorescence is a phenomenon that emits light because of light. It does not emit light by itself but must be illuminated by light before it can light up.
Classification of fluorescent dyes:
Fluorescent brighteners: Widely used in textiles, papermaking, laundry detergent, soap, rubber, plastics, pigments and paints. When making fabrics or clothes, the natural materials used (such as cotton, linen, etc.) are not white enough, some are yellowish, some are gray, and they do not look so "white". Fluorescent brighteners (a special type of fluorescent dye) can absorb ultraviolet rays (light that is invisible to the human eye) and then convert this energy into light that is visible to the naked eye. When an object is yellowish, the fluorescent brightener will emit a little blue light to neutralize the yellow, making the object look whiter and brighter. Fluorescent whitening agents make things white, also easily combine with fabrics, dissolve, and apply evenly. They are not easy to fade after washing, sun exposure, or damage during ironing, and are very practical.
Dispersed fluorescent dyes: The molecules of fluorescent dyes are so small that they are not easily soluble in water. To prevent the dyes from agglomerating in water and distribute them evenly, dispersants are needed (just like detergent can dissolve oil in water), so the dyes can penetrate smoothly into the fibers (such as chemical fibers). Under high-temperature conditions, these dyes can quickly dye into artificial fibers (such as polyester), which means that the dyeing efficiency is very high and can be completed in a few minutes or even faster. Therefore, the dyed fabrics are not easy to fade, and the colors are bright whether they are rubbed or washed.
Fluorescent coatings: This dyeing material is mainly fluorescent pigments, not fluorescent dyes. They are mixed with dispersants and wetting agents to form a "paste" (something like a paste). This slurry is insoluble in water and is not easily absorbed by fibers, so it is impossible to dye this pigment into the fabric using conventional dyeing methods. Use a machine to soak the fabric in the pigment slurry, and then squeeze it to make the pigment adhere more evenly. However, the fluorescent pigment itself will not stick to the fabric automatically, so you need to use a "binder" (usually a colloid containing resin components) to firmly "stick" the pigment to the surface of the fabric. In this way, although the pigment does not enter the fiber, it can also achieve a good coloring effect and is not easy to fade.
Application of fluorescent dyes:
In the textile industry: As mentioned above, fluorescent brighteners are used to improve the whiteness of fabrics, dispersed fluorescent dyes are used for chemical fiber dyeing, and fluorescent coatings are used for fiber surface dyeing, etc., to meet different textile needs.
In scientific research:
- Cell imaging and flow cytometry: Fluorescent dyes can absorb light energy of a specific wavelength and then re-emit light energy at a longer wavelength. Scientists use this property to add dyes to cells when observing cells, and the dyes emit light. We can see the structure of cells more clearly under a microscope.
- Nucleic acid labeling and detection: Many fluorescent dyes can stain DNA or RNA in cells, such as PI and Hoechst, which can be used to stain DNA in cells; thiazole orange and acridine orange are used to stain RNA. Once stained, they will emit light under specific light, allowing us to see the distribution of DNA or RNA in cells. By observing the intensity of the light, scientists can know how much genetic material is in the cell and analyze which stage of activity the cell is going through.
- Labeling biological molecules: Scientists often add fluorescent dyes to some special small molecules. When scientists observe with a microscope, they can see how these molecules move in the cell, like tracking their "trajectory". FRET is one of the observation methods.
Where can you buy Fluorescent pigments in bulk?
Fluorescent pigments emit bright, visible light under ultraviolet or other light sources and are widely used in various applications, including fluorescent coatings, stationery, textiles, plastics, advertising signage, and electronic displays. As a professional Daylight fluorescent pigment ingredients. supplier and manufacturer, Wanlong Chemical Co., LTD. has nearly 10 years of experience in supplying and exporting fluorescent pigment ingredients from China. You can confidently purchase fluorescent powder from Wanlong Chemical Co., LTD. If you have any questions or concerns, please feel free to contact us and we will get back to you within 1 business day.
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Established in 1989, Wanlong Chemical Co., LTD. has been focusing on polymer synthesis and fine chemical intermediates research and development and production for nearly 40 years, and has developed three business systems - polymer materials, organic dyes and chemical intermediates, including Fluorescent pigment powder. We offer wholesale prices for bulk purchases, even for small quantities, and offer a free sample to potential customers. If you have needs please contact us.
Post time: 2025-04-14 11:39:45
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