And we pour some water into it, and we rub the ink stick, and then we can get the liquidink we are gonna use in painting and writing.
我们往砚台中倒一些水，在它上面磨墨，然后我们就可以得到用来写字作画的墨汁。
2
Category II: liquidink in pens and similar materials in liquid form appearing as such in the toy (e. g. glue sticks, slimes, bubble solution).
II类材料：在玩具上呈固态或液态的类似材料(例如胶水、粘液、泡泡水)。
3
Ink viscosity is one of the most subtle parameters of liquidink in the printing process, therefore the control of viscosity is very important for printing quality and cost savings.