Highlighter is a pen used to mark markers in recent years. It uses thicker and lighter ink to cover key areas for marking. After marking, it is clear that the text is not blocked. The highlighter has a fluorescent agent. When it encounters ultraviolet light (fluorescent lamp, fluorescent lamp, etc.), it will produce a fluorescent effect and emit white light, which makes the color look dazzling and fluorescent. It is usually used for office study.

The key principle of highlighter is to add visible fluorescent (composite) compounds to the ink under the stimulation of ultraviolet rays. Through the absorbed light energy, the energy level transition of the atom is produced, and then the absorbed excess energy is released. The anti-counterfeiting function is to emit red, yellow, green and blue (400nm-800nm) visible light under ultraviolet light (200nm-400nm). The ink is divided into colored and colorless, long-wave (365nm) and short-wave (254nm). Fluorescent pigments are organic complexes that are finely ground and have high luminous efficiency. They are usually colorless or light white in ultraviolet light (200nm~400nm), and squares present various colors of visible light (400nm~800nm). According to the wavelength of the excitation light source, it can be divided into short-wave ultraviolet-excited fluorescent pigments (excitation wavelength is 254nm) and long-wave ultraviolet-excited fluorescent pigments (excitation wavelength is 365nm). The highlighter has a fluorescent agent. When it encounters ultraviolet light (fluorescent lamp, fluorescent lamp, etc.), it will produce a fluorescent effect and emit white light, which makes the color look like dazzling fluorescence.
Nowadays, colorless highlighters can also be hidden. After writing, there is no color, and after being illuminated with the purple light behind the pen, the written content can be displayed.

Highlighter is usually used for drawing and marking. When choosing, you can stack two translucent report paper or typing paper together, and write a few words with a highlighter on the paper, pay attention to the mild and severe frustration, and then turn it over In order to check that the high-quality highlighter is located on the back of the top paper, there should be no color penetration, and there should be no handwriting on the next page.