According to JB/T 7999—2013 “Bonded abrasive products—Testing methods for the volume density, general porosity and water absorption”, the volume density of working layer of ceramic superhard abrasive tools was measured, and the influencing factors were analyzed.The results show that when measuring, the sampling quantity should be more than 0.50 g, the sample quantity decreases, the testing results show a downward trend.When the volume density of the sample exceeds 2.85 g/cm
3, the vacuum treatment procedure can be omitted. When the volume density ranges from 2.50 to 2.85 g/cm
3, the vacuum treatment operation can be changed to soak in deionized water for 1 hour.When the volume density is less than 2.50 g/cm
3, it needs to be vacuum treated.