The Iron Glaze
This gallery contains pottery
glazed with glazes which all contain various forms of iron oxide
as the main (or only) mineral supplying color. It is the most
common colorant in pottery glazes, and can give yellows, rust
reds, browns, blacks, blues, greens, and grays. We formulate
and make our glazes which makes them unique to our work *
The oxides (differing amounts
of oxygen in combination with atoms of iron) give different
colors when mixed with different types of glazes in amounts
as low as 1/2 % to as high as 10%. Too much iron will usually
supersaturate a glaze which cannot thoroughly combine with all
the excess iron and cause it to percipitate (fall) out forming
either interesting metallic areas or crystallize on cooling.
The Chinese of the Sung
Dynasty relied heavily on iron for the various colors it could
give. This range is largely due to iron's ability to dissolve
in a molten glass, which is what a glaze is when heated. The
quantity, and amount of iron in the glaze, type of iron, and
the kind of atmosphere during the firing in the kiln determine
the color it gives.
Our glazes Do Not contain
on an image to see a larger view and description of the piece.