When the mortar has hardened, chet started to pull the inner container and let the cement dry but be sure know tile start strong and do not flow back into the gaps when the inner container.
When such a solid start and mortar. Pull out the inner container Then let it dry plaster But be sure that it does not flow back to cement a solid start to the gap when the container inside out.
When the plaster starts Chet rigid body, pull the container inside out and let ปูนแห้ง. But be sure now that mortar began to flow back into the solid space when the container inside out.