Slip casting is a versatile ceramic forming method that takes advantage of gypsum's ability to absorb water. The process begins with the preparation of a slurry, a fluid mixture of fine clay and water, often with deflocculants to reduce viscosity. This slip is poured into a plaster mold, whose porous walls draw the water out, progressively solidifying a layer of clay against its inner surface. When the desired thickness is reached, the excess slip is removed, leaving a hollow "shell" of clay in the exact shape of the mold.
Once the piece has reached the proper consistency, it is removed from the mold to dry completely before firing. This process is particularly suitable for the mass production of complex, light and uniform shapes, such as tableware, decorative figures and technical components.
Interesting Fact
Its origin dates back to ancient China, where it was used to manufacture high quality porcelain. This method enabled Chinese craftsmen to produce pieces with exceptional precision and finesse, which gave them a competitive advantage in the export of ceramics.
Helpful Tip
Keep your plaster molds in optimal condition; their absorption capacity decreases with time and use. If you notice that the pieces take longer to form or show irregularities, it may be time to renew the mold.
.jpg/large)
