Question

What is the purpose of adding grog to clay?

• A. To reduce shrinkage
• B. To increase plasticity
• C. To improve texture
• D. To add color

Hint:

Grog reduces shrinkage, preventing warping and cracking during firing.

Answer 1

The Correct Option is A

Grog is a valuable additive in clay bodies due to its unique properties: Grog is made up of crushed, previously fired clay. Adding grog to clay bodies helps to reduce the amount of shrinkage during drying and firing by reducing the amount of water in the clay. By minimizing shrinkage, grog can prevent the clay from warping or cracking during drying and firing. Grog does not increase plasticity, add color, or affect texture significantly.