obtain the suitable specific gravity and viscosity for casting.
4. Your group will get 5 or 6 square-shape working molds. Make sure you clean them before using it. You may need to use talc to prevent sticking.
5. You have to stir the slip for a while before pour it into the molds. Leave the slip in each mold with different time (5, 10 and 15 min for china clay, 15, 25 and 35 min for ball clay, 7, 12 and 20 min for body) before the slip is drained out from the mold. Let all slip out off the mold by leaving on the container or beaker. The thixotropy should be determined for different times as well.
6. Leave it dry in the air before measure the thickness of slip-cast. You need to cut and measure all four sides and find the average value.