Highlighters are divided into two types: water-based and oil-based.
Similar to colored pens, water-based pens are non-toxic, but not easy to dry. And the coverage is not good, the surface of some items cannot be written on, and the two colors will look dirty when stacked together.
Oil-based pens are synthetic solvents that use alcohol to dissolve color, and some sensitive people will feel dizzy when they smell it. But it's easy to write and dry, has good coverage, and is less expensive.
There are also some highlighters that come with a fruity scent.
