Does highlighter really glow when writing at night?

There is a fluorescent agent in the highlighter, so it will emit white light.

Fluorescent pen has fluorescent agent, which will produce fluorescent effect when it meets ultraviolet rays (such as sunlight, fluorescent lamp and mercury lamp), and emit white light, thus making the color look dazzling fluorescent.

The fluorescent principle of highlighter is different from that of watches and glow sticks. The inside of the glow stick is radioactive, and the generated rays excite the surrounding fluorescent powder to emit light, so it can also emit light at night without any ultraviolet rays.

The highlighter only glows when it is irradiated by ultraviolet light. If you put the handwriting of the highlighter near the mosquito trap and the money detector, you can see it very clearly.

Extended data:

Related danger

The principle of highlighter is to generate atomic energy level transition by absorbing light energy, and then release the absorbed excess energy. Some fluorescent agent was added to the highlighter. Some fluorescent substances are toxic and have potential carcinogenic components, which are harmful to human body after long-term use and are cheap.

In order to reduce costs, some small workshops will use toxic fluorescent agents as raw materials for fluorescent pens. In addition, because highlighters contain a lot of fluorescent agents, long-term use will also seriously affect children's vision.

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