Technical Insights

Technical Application Note: Fluorescent Brightener OB (CAS No. 7128-64-5)

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1. Introduction Fluorescent Brightener OB (Optical brightener OB) is a highly effective optical brightening agent (OBA), also known as a fluorescent whitening agent (FWA). It belongs to the bis-benzoxazole family and is renowned for its exceptional ability to enhance the whiteness and brightness of substrates. By absorbing invisible ultraviolet light and re-emitting it as visible […]

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Plastic optical brightener: Fluorescent brightener 184 (C.I. 184)

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Fluorescent brightener 184 (C.I. 184) Trade name: Oribrite optical brightener OB. Foreign trade names: Uvitex OB (OB-C, OB-P) (CIBA), Whitex PNF (NSK). Hue/Tone: blue. Physicochemical properties: Oribrite OB(equivalent to Uvitex OB) is a pure optical brightener, used for various special purposes. It does not contain fillers, the appearance is light yellow to milky white powder, odorless, the melting point

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Optical brightener FP-127/ CBS-127/ OBA 378

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Synonyms: fluorescent whitening agent 127, FP, FP-127, CBS-127. Uvitex FP, FP-P, FP-C (Clariant). Hue/tone: blue/bluish. Physical and chemical properties: The product is light yellow crystalline powder with a melting point of 216～220°C. The maximum absorption wavelength is 368nm, and the maximum fluorescence emission wavelength is 436nm. Insoluble in water, soluble in most organic solvents such as

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Optical brighteners VS fluorescent dyes

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The common point is that both can emit fluorescence. The difference is that optical brightener absorbs invisible ultraviolet light and emits visible fluorescence with shorter wavelengths; while fluorescent dyes absorb visible light and emits visible fluorescence with longer wavelengths. In Common Absorb Emit Fluorescent Brightener Emit fluorescent Invisible ultraviolet light Visible fluorescence with shorter wavelengths Fluorescent Dyes Emit

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What is optical brightener? How do optical brighteners work?

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Optical brighteners, also know as fluorescent brightener, optical brightening agents(OBA), fluorescent brightening agent( FBA), Fluorescent whitening agent(FWA). Optical brighteners operate by the phenomena of fluorescence. Optical brighteners are dyes that absorb light in the UV and violet region(usually 340‐370 nm) of the EM spectrum and re-emit light in the blue region (typically 420‐470 nm). They are often used

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