Grinding and Lapping Compound or Paste: Clover & Polishing ...
In extra coarse there are few grits of larger size abrasives, and it is used for rough lapping. In extra fine grinding paste, there are a very large number of grits of very fine particles and it is used for fine lapping. The larger the grit rating of the lapping paste, the finer is the paste. Correct Methods of Manual Lapping