For less abrasion of grinding material, we recommend not using less sample volume as recommended for the 80 ml grinding bowl (10-30 ml useful volume). We took 16 gram of sample and ground for 30 seconds. It has shown that the sample uses to be easy to get ground.
We proceeded grinding for a total of 2 minutes. Afterwards, all junks got comminuted. A fine powder use to be present now. Sample is only sticking lightly to grinding balls or bowl.
It also might be possible to grind a further minute before sticking will get stronger.
Also the usage of grinding bowl and balls made of tempered steel will be possible with this sample.