Refill ink whiteboard colored marker pen ink

1.Alcohol whiteboard water based pen ink
the ink is the alcohol based pigment ink
can be wiped off when you finish the writing
the ink can stand on the board for a long time
there is no special requirement for enviroment.

2.Water based whiteboard pen ink
The ink is water baesd pigment ink which is alcohol-free.
There is no damage for the board
The time of leaving the cup is long