Features

• Storage stability
• it can use normally which stores in normal temperature for more than 3 years.
• Easy to rub
• Rubbing at once: it does not need to do arc circle and rub clearly in twice.
• Rubbing at right time( 30 seconds after writing) : the effect of rubbing is the best.
• Rubbing after a week: the effect of rubbing is better.
• Rubbing after three months: can be rubbed.
• Freezing fastness
• write normally below ten degree centigrade.
• write fluently
• It can also write fluently after the head of pen dip the water
• The condition of dirt board
• After solidification, the surface of ink forms mucosa which can become strip and lump granule without any blot leaving on the board and whiteboard eraser. And when testing on the plot ,it can use figures instead of board eraser to test its effect.