Have you encountered many customers who don't know which whitening product they are looking for? Anyway, they just want white. Through our careful and in-depth discussion, we found that it is not our optical brighteners that is suitable for customers, but another product bleaching agent or titanium dioxide. So what are the differences between these three and how to apply them? Next, Hangzhou Tongge Energy Technology Co., Ltd. will make a detailed analysis.
Optical brightener is a fluorescent dye, or white dye, and is also a complex organic compound. Its characteristic is that it can excite the incident light to produce fluorescence, so that the dyed substance obtains a glittering effect similar to fluorite, making the substance seen by the naked eye very white.
Titanium dioxide is an important inorganic chemical pigment, and it is also a very good white pigment. It also has the functions of reinforcement, anti-aging and filling. It is widely used in rubber products and plastic pipe profiles.
Bleaching agents are some chemicals that can convert colored molecules into colorless molecules through redox reactions to remove or lighten the color to achieve the function of bleaching items.
The function of optical brighteners is to convert the invisible ultraviolet radiation absorbed by the product into purple-blue fluorescent radiation, which complements the original yellow light radiation to become white light, thereby improving the whiteness of the product under sunlight.
Titanium dioxide is generally used as a base color for whitening, and it can also cover some other color components to increase whiteness.
Bleaching agents consume oxygen in food through chemical reactions such as reduction, destroy and inhibit the activity of food oxidases and food coloring factors, and make food browning pigments fade or avoid browning. At the same time, they also have a certain antiseptic effect.
Both optical brighteners and titanium dioxide are physical whitening agents, and they do not react with other raw materials, while bleaching agents achieve whitening through chemical reactions. There are some differences between the physical whitening of Optical brighteners and titanium dioxide. Titanium dioxide is mainly used for covering, which may cause problems such as uneven covering and insufficient covering strength. Optical brighteners whitens by absorbing and reflecting light, and the whitening effect is more uniform and has high light fastness. Some manufacturers will use Optical brighteners and titanium dioxide together, and the effect is 1+1 greater than 2.
