In recent years, as consumers' health awareness has increased, the concept of laundry detergent without optical brighteners washing products has gradually become popular. In fact, the amount of optical brightener added is very small, and it will not affect our health at all. Even due to consumers' increasing requirements for the appearance quality of detergents and the cleaning and sanitation of clothes, the application of optical brightener in detergents becomes more and more important, and its role cannot be replaced by any other auxiliary agent.
The role of washing fluorescent whitening agent
1. Improve washing effect
The detergent added with fluorescent whitening agent can whiten and brighten the washed items, and visually improve the washing effect of the detergent. The use of detergent fabrics with added optical brighteners will make the fabrics washed and whiter and brighter within a certain number of washings, and will increase with the increase of the optical brighteners content in the washing products. After a certain number of washings, The whiteness change is not significant.
If the content of the optical brighteners in the washing product is very low, the whitening effect of the washed fabric will not be very obvious.
If there is no optical brighteners in the detergent, the whitened fabric will gradually wash off the existing optical brighteners on the original fabric due to the action of the surfactant, and the whiteness of the fabric will vary with the number of washings. As the increase gradually decreases, the brilliance will gradually disappear, giving people a feeling of washing and blackening. At the same time, it will also make people feel that the washing effect of detergent without fluorescent brightener is not good.
2. Improve the appearance of the detergent body
Adding washing optical brighteners can significantly increase the whiteness of the detergent (such as washing powder, soap, etc.) and improve its appearance. The presence or absence of optical brighteners in washing powder and soap has a great influence on its appearance. Washing powder or soap without optical brighteners is dark in color, giving people a feeling of uncleanness, and it is natural to think of using it. Can this kind of unclean detergent wash things clean? This is bound to affect the sales of washing products.
If a certain amount of optical brighteners is added to washing powder or soap, under the irradiation of ultraviolet light source, the powder can not only reflect visible light, but also absorb ultraviolet light in the form of fluorescence in the blue and purple light regions. When emitted, the blue and purple fluorescence complements the yellowish light on the powder surface to form white light, which increases the whiteness and brightness of the detergent. At the same time, it also arouses consumers' desire to buy, and its products will go to a higher level, and the price and taste will naturally be higher. Therefore, in some countries, the sales volume of white washing powder is dominant, and the role of optical brighteners has to be said to be an important factor.