The testing process porositan clay bodies are as follows:
1. Weigh each test specimen that had been burned at combustion temperatures of all three formulas are made in a dry state.
2. Insert the specimen into a plastic basin and let the specimen is immersed in water for 24 hours.
3. Retrieve all wet specimens and remove the foam moist. Then weigh more new specimens immersed. The calculation results as wet weight scales.
- Dry shrinkage, a shrinkage rate of the clay body into a plastic dry conditions (indicated by the percentage of dry shrinkage).
- Fuel temperature, fuel level capabilities clay body, as shown by the physical properties that seem appropriate temperature fuel.
- Losses fuel (susust number), is the depreciation rate of the clay body into a plastic condition biscuits (indicated by the percentage of shrinkage fuel).
- Color burn, is the physical properties of the clay body after a combustion process.
- Sound, a sound loudness biskut clay body after a combustion process.
- Porosity, a water absorption rate by weight clay biscuits (indicated by the high percentage of porosity).