Purple flashlight can detect whether clothes contain fluorescent agent by irradiation, but it can't detect whether its content exceeds the standard. Many purple flashlights in the market do not have a certificate, and there is no factory name and address, which may have quality problems. Consumers must be careful when buying and using.
The whitening and brightening function of fluorescent agent is widely used in many fields such as textile, paper making, washing, etc. The relevant national standards also allow manufacturers to add fluorescent agent within the specified range. Purple flashlights with qualified parameters can really detect whether clothes, paper and other items contain fluorescent agents. Sun Baiwang, a professor at the School of Chemistry and Chemical Engineering of Southeast University, also publicly stated: "Fluorescent agent is a relatively safe chemical substance, but according to medical clinical experiments, if it is exposed to fluorescent agent excessively, it will mutate cells and pose a potential threat to health."
Although the purple flashlight can detect clothes, diapers and so on. It contains fluorescent agent, so it is impossible to judge whether its content exceeds the standard.
Ultraviolet rays are mainly used for medical disinfection and treatment. As a medical device, the state has strict standards. Long-term exposure of human eyes to ultraviolet rays will cause slight foreign body sensation and discomfort, burning sensation, severe pain, photophobia, tears, eyelid spasm and so on. And excessive ultraviolet rays can also cause fundus damage. Ultraviolet rays will do some harm to ordinary people, especially pregnant women, so they should be used with caution or even banned.