What is Molochite used for?

Molochite is widely used as filler for the production of glazes and engobes. Freedom from contamination and accurate control of physical and chemical properties make Molochite the ideal choice for high quality end products.

What does Molochite do to Clay?

The downside to Molochite is if large particles of them are added to clay bodies, it might cause firing failures such as micro-cracking and large-scale cracks.

What is Molochite?

Molochite is a man-made, pure-white, granular material produced from the calcination of kaolin. Its high refractoriness is harnessed in foundry, refractory and ceramic applications.

What is Molochite grog?

Molochite 120 is a 120-mesh grog that is great for use in porcelain clay bodies, as it is the cleanest, whitest grog available. This material is made of calcined Grolleg porcelain, and is typically used in the whitest porcelain clay bodies to reduce cracking in drying and firing.

Why is grog added to clay?

Applications. Grog is used in pottery and sculpture to add a gritty, rustic texture called “tooth”; it reduces shrinkage and aids even drying. This prevents defects such as cracking, crows feet patterning, and lamination. The coarse particles open the green clay body to allow gases to escape.

How much grog do I add to clay?

A sculpture clay body, for example, typically has 15-25% grog (but can have much more). Since grog is typically prefired, its does not normally undergo a firing shrinkage (unless the body in which it is a part is fired to a temperature higher than the grog was initially fired at).

What can I use for grog?

However, a substance called Molochite can be used as grog in porcelain. Molochite is made of kaolin, a white clay, that has been fired at a high temperature. It is a clean grog with a fine mesh of 120. Also, it is glassy and white when fired, so it does not compromise the texture of porcelain.

Can you use sand as grog?

Sand has the same forming properties of grog in the greenware stage. But since it’s essentially ground up silica, an ingredient in clay and glaze, adding too much can cause fit uses between the clay body and glaze. Experiment with ratios of sand to clay. Less than 7% sand to clay is a good rule of thumb.