There are three major forms of iron used in ceramics.
Ceramics black iron oxide.
Iron oxide has many uses including pigments ceramics thermite welding along with a wide range of other uses.
Black iron oxide feo is one of the most common colorants in pottery and it is widely used be.
Description handling recommendations a common versatile and economical glaze colorant producing various colors based on recipe and firing conditions.
Most iron used in glazes is introduced as red iron oxide ferric oxide fe 2 o 3.
Iron oxides they are the commonest colourants in individual pottery usually giving yellows browns blacks and greys.
Priced per quarter pound.
This is a natural black iron oxide that will have more impurities than synthetic black iron oxide.
Synthetic black iron is much more expensive than the natural finely ground material 200 mesh but if there are good reasons for its use and percentages in the product recipe are low enough the cost may be justified.
Although its raw color is different it is chemically identical to and acts the same as red iron oxide.
Please follow handling instructions.
Yellow iron oxide is another form of ferric oxide.
It discusses the importance of wiping back how to avoid uneven coverage and many other useful hints.
Iron oxide black 1 4 lb.
Iron oxide is popular because it can give many colour variations.
The oxide responds differently to different glaze recipes and kiln atmospheres.
A demonstration of how to use an oxide wash on pottery.
Black iron oxide ferrous oxide fe 3 o 4 is courser and generally not used.
This product may contain small amounts of hazardous c.
The black iron used in ceramics is generally this synthetic form the natural equivalent mineral magnetite contains 5 15 impurities.
Red iron oxide fe 20 3 black iron oxide feo or fe 3o 4 and yellow iron oxide feo oh.
Msds and spec sheets can be found here.
There are different mesh sizes and grades and each contains varying degrees of impurities that can make a significant difference in the results you get.