Magnesium Carbonate - Light GOLD STAR
Magnesium Carbonate - Light
Magnesium Carbonate is used in glazes as a source of magnesium oxide which is a high-temperature flux.
Using quantities up to 10% produces a semi-matt surface. Magnesium Carbonate Light is more readily mixed into the glaze and less likely to crawl and pinhole.
Available in either the light or medium light form, it is a flux in high temperature glazes (up to 10%) used to produce a smooth buttery surface.
Used in excess a semi-matt surface may be produced and very large quantities may cause pin holing and crawling.
In low temperature glazes it reduces fluidity.
Available as both very light and medium light (fluffiness) - as against Heavy Magnesium Carbonate also called Magnesite which is no longer available.
Our tests show that both very light and medium light work equally well in most glazes.
Used in conjunction with cobalt and manganese it produces interesting colour effects.
References to light and heavy magnesium carbonates actually refer to the magnesium hydroxy carbonates hydromagnesite and dypingite (respectively)