Black Iron Oxide (Pottery Colourant)

Colourants can be added to glazes to get the desired coloured effects. Unlike stains, colourants react differently in each firing. A wide spectrum of colours can be achieved by mixing them with other colourants, opacifiers & stains.

Name: Iron Oxide (Fe₂O3)

Appearance Colour: Black

Form: Powder

Recommended Usage:

• In Slips: 0.5%-8%
• In Glazes: <15%

Output Colour: Varied

Stability: Relatively stable when compared to yellow iron oxide.

Additional Information: Black iron oxide is the reduced form of red iron oxide. In this reduced form, it acts as a flux, meaning that it it promotes the formation of glass within the glaze. As a glaze component, it can create varied effects depending on the conditions. In general the following occurs with iron oxide:

• oxidation firings produce red iron oxide
• reduction firings produce black iron oxide

Caution: In its powdered form, black iron oxide can cause skin, eye and respiratory tract irritation and sensitization. Please use protective coverings when handling this chemical.

Note: Owing to the nature of ceramic making process and the varied combinations of elements, we request the user to always test their formulations before bulk production/purchase. It is for the user to satisfy that the product meets their requirements.