Plaster Molds For Ceramic Slip Casting Process

From simple one piece plaster molds to more complex multi part molds plaster mold making allows the potter the freedom to experiment with ideas for form and surface because it takes away a bit of the preciousness of a one of a kind wheel thrown pot.

Plaster molds for ceramic slip casting process. If you are using brand new slip it should be ready to go. How to make a plaster mold for slip casting part 2. You are ready to cast some slip. Slip casting can be useful for making multiples of one object and to make casts that are hollow on the inside.

While it was once thought of as cheating using ceramic molds is a technique that is increasing in popularity among potters these days. Carefully pour your slip into the cavity of the mold and the plaster of paris mold will start to absorb water from the clay and the drying process of the clay will begin. In this method ceramic particles are suspended in water an cast into porous plater molds. The life of a plaster mold is around 90 replicas.

This tutorial is demonstrating how to slip cast porcelain in an already existing plaster mold easily and efficiently. For a tutorial on how to make a plaster mold please refer to the plaster mold making tutorial for more information. This happens because the mold absorbs the water from the slip through its pores collecting the ceramic particles against the mold. Iso static pressing ceramic production process casting slip casting.

Once the clay has started to dry to a suitable thickness the timing will depend on the size of the mold but for a medium small mold 10 minutes should do then you can pour out the excess clay slip. With a plaster mold you are going to be able to make replicas of the same design in ceramics. After the plaster has hardened i generally wait 24 hours you can tear the box away from the outside of the mold and remove the cup. Slip casting method is used to produce complex shapes.

Wrap aluminum flashing around the prototype to serve as cottle boards leaving a 1 2 inch gap between the flashing and the edge of the clay form the flashing creates a barrier to contain the plaster once it is poured onto the prototype 3. The slip casting process 1. The pores in the mold create a capillary pressure because of this the water in the slip is absorbed by the mold.