How is diamond grit measured?
Diamond abrasives are traditionally sold in US mesh size ranges, these mesh sizes are defined by the mesh size of sieves used to separate the diamond particles. The sieve sizes are graduated and defined by the number of lines per inch of each sieve e.g. 50 lines per inch or 20 lines per inch. The diamond is then sold in overlapping mesh size ranges. This means for example in a sample of 40/50 US mesh diamond most of the material would fall between the 40 mesh and the 50 mesh sieve. International standards permit that a small amount of oversize and undersize material is permitted, but this is usually no more than 2-4%. What is the standard to classify the quality of diamond? There are a few kinds of criterions to classify the quality of diamond, including crystal shape, strength, impact toughness, thermal stability, etc. So diamond always is classified into a few series according to their characteristics, for example, SUKAN diamond can be classified into RSD, RBD, RMD and RRB series. Wh
