Water content should be adjusted to suit the ingredients so that timely reaction the hardening of plaster with sawdust and minimize air bubbles insert the test stick is inside, as a result, the rods have a lower strength.
Water intake should be adjusted to suit the reaction mixture to keep the erection of plaster and sawdust to reduce foaming rods inserted inside the test results in the bars with strength reduction.
Should adjust the amount of water to suit the ingredients to keep abreast of the coagulation reactions of plaster with sawdust and reducing air bubbles inserted inside the bar test that resulted in a bar exam has a hardness strength decreased.