Talc is a magnesium silicate mineral used in ceramics mainly as a degreaser and to modify the texture and melting of ceramic glazes. Its main advantage lies in its ability to improve the plasticity of the clay, making the clay body more malleable and flexible, which facilitates the formation and modeling of pieces. In addition, talc also contributes to the thermal stability of the pieces during firing, helping the pieces not to deform or crack under extreme temperatures.
It is particularly useful when working with clays that need improved workability or when seeking to avoid excessive shrinkage during drying and firing.
Interesting Fact
Talc, due to its softness, is also used in the cosmetics industry as a base for products such as talcum powder, due to its absorbent and softening properties.
Helpful Tip
If you are working with a clay that feels too hard or brittle, try adding a small amount of talc to your mix. This will not only improve workability, but may also reduce shrinkage during firing.
