Truing is the tool or to arrange the surface of the pad.[In the case of Diamond tool] The height of all DP is made even and the DP face is made smooth.
by using grindstone for correction.
Grindstone for correction
Abrasive：GC, Alumina etc.
※In the case of truing of polishing pad, we use metal for a bond, because the abrasive which fell off from correction grindstone, may hurt work material if the vitrified or resinoid is used.