This can affect the appearance of the wares being fired and, for example, some glazes containing iron fire brown in an oxidising atmosphere, but green in a reducing atmosphere.
22.
The fuel might be wood or ( generally less often ) coal, which affected the atmosphere of the firing; wood giving a reducing atmosphere and coal an oxidizing one.
23.
If high conductivity copper needs to be welded or brazed or used in a reducing atmosphere, then oxygen-free copper ( CW008A or ASTM designation C10100 ) may be used.
24.
If, however, a mostly reducing atmosphere ( such as hydrogen with a small amount of oxygen ) comes into contact with the wires, the chromium in the chromel alloy oxidizes.
25.
In contrast to the general notion of early earth's reducing atmosphere, researchers at the Rensselaer Polytechnic Institute in New York reported the possibility of oxygen available around 4.3 billion years ago.
26.
Celadons are almost exclusively fired in a reducing atmosphere kiln as the chemical changes in the iron oxide which accompany depriving it of free oxygen are what produce the desired colors.
27.
Slight modifications in the manufacturing process ( the type of reducing atmosphere, small variations of stoichiometry of the reagents, addition of carbon or rare-earth halides ) can significantly influence the emission wavelengths.
28.
By blocking the kiln vents to restrict air flow to the fire a reducing atmosphere of hydrogen and carbon monoxide could be maintained, which was necessary for some glazes such as copper red.
29.
Towering over the rest of the ground, the 2, 874 capacity stand provided improved viewing facilities but was criticised for reducing atmosphere levels as it was detached from the rest of The Stadium.
30.
In brazing copper, a reducing atmosphere ( or even a reducing flame ) may react with the oxygen residues in the metal, which are present as cuprous oxide inclusions, and cause hydrogen embrittlement.
