White calligraphy ink(Whit) made by Windsor&Newton.

The ink is very opaque and flows well but must be shaken before use because the elements contained are not in permanent suspension.

Distilled water(H₂O) is useful whenever water must be added to any mixture，it is much cleaner and makes for a smoother mixture than tap water or drinking water.

Bister(Bis) is a pigment made from the soot and tar of burnt wood or shellac or the ground bark of walnuts and gum arabic. Bister comes from French from the word 'bistre' which stands for brown，hazelnut，dark brown or chocolate brown.



The disadvantage is the non-lightfastness of this material，which easily dissolves in water. The more water used，the lighter the drawing. Drawings made in bister gradually disappear when exposed to sunlight.