Plaster Molds For Ceramic Slip Casting Process

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.

Plaster molds for ceramic slip casting process.

The pores in the mold create a capillary pressure because of this the water in the slip is absorbed by the mold. This happens because the mold absorbs the water from the slip through its pores collecting the ceramic particles against the mold. The life of a plaster mold is around 90 replicas. 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.

While it was once thought of as cheating using ceramic molds is a technique that is increasing in popularity among potters these days. 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. Hello everyone in this class we are going to learn how to make a plaster mold for the slip casting technique in ceramics. How to make a plaster mold for slip casting part 2.

Slip casting method is used to produce complex shapes. This tutorial is demonstrating how to slip cast porcelain in an already existing plaster mold easily and efficiently. Iso static pressing ceramic production process casting slip casting. Slip casting is the process of filling the molds with slip which is the liquid clay allowing it to solidify and after a while forming a layer called the cast inside of the mold s walls.

Begin by making sure your slip is liquid and easily pourable. 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. 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.

You are ready to cast some slip. For a tutorial on how to make a plaster mold please refer to the plaster mold making tutorial for more information. With a plaster mold you are going to be able to make replicas of the same design in ceramics.