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1. The influence of solvent The absorption spectrum characteristics of optical brighteners are closely related to the solvent used. The position and intensity of the fluorescence spectrum of the same optical brightener in different solvents may be significantly different. Therefore, to determine the Read More
According to chemical structure, it can be divided into five categories: 1. Stilbene type, used in cotton fiber and some synthetic fibers, papermaking, soap making and other industries, with blue fluorescence;2. Coumarin type, with the basic structure of coumarone, used in celluloid, PVC, etc., with Read More
When it comes to the detection of fluorescent whitening agents, the first thing everyone thinks of is to use a currency detector to irradiate it, which is the ultraviolet lamp method. Since the principle of the fluorescent whitening agent is that the blue light excited by the ultraviolet light neutr Read More
Let us first understand the fluorescent brightener. It is a type of fluorescent dye, which belongs to a separate category in the Colour Index (C.I.). The molecular structure of fluorescent whitening agent is mainly composed of a continuous conjugated system containing an aromatic ring and one or mor Read More