soon as 20 minutes after it was placed in the oven the firmness of the cast depends on the type of materials used the solids loading in the slurry the deflocculant level and the casting time and temperature the amount of binder and initiator added and the age of the slurry also influence the firmness of the cast the cast can be removed from the mold almost immediately after the mold is opened but the casts are somewhat soft less deformation occurs when the cast is allowed to air dry while supported by the mold in some cases it is desirable to release the cast into a cradle designed to support the cast while drying occurs additional materials can be added to the dispersion of this invention including ph modifiers surfactants defoaming agents and plasticizers the novelty of this invention can be best understood from the following i working and ii comparative examples and the accompanying tables working examples of this invention were primarily focused for producing complex shapes of some selected ceramic and ceramic composite systems including alumina zirconia zirconia alumina composites mullite and cordierite by the binder coagulation casting process some examples of materials used in this invention are described.