Markers can be divided into oil-based markers and water-based markers.
Oil-based markers: also called alcohol-based markers. Dry very quickly, water-resistant, dry-resistant. Not soluble in water, soluble in alcohol, if the pen is dry, add a little alcohol in the quill and can be used again.
Water-based markers: can be dissolved in water, dry to the core of the pen to add some water can also be used for a period of time.
Watercolour pencils: are often used by children, a box of a box of the kind, in fact, is a water-based marker pen
Neutral pen: that is, we usually see the most in life. It is also a signing pen
1. Look at the logo on the pen
2. Ask the seller when you buy it, or try it directly in a stationery shop
3. Do experiments with certainty other pens (except neutral) write on the paper not sure of the colouring.
If it melts only with oil-based pens, it is oil-based.
If it melts only with water-based pens, then it is water-based. If it all melts, it's neutral, or a fake pen!
Note: Because oil-based markers are very penetrating, they will usually print on the back of the paper. And water-based marker is more transparent, will not print to the back.