Reduce flame and simmer until tender-- about 45 minutes to 1 hour.
2.
:: : : It appears that Goethite becomes magnetic in a reducing flame.
3.
Reduce flame to minimum setting that will still allow you to maintain boil.
4.
A reducing flame ( fuel rich ) gives trouble with soot deposits in the weld.
5.
The reducing flame is typically used for hard facing operations or backhand pipe welding techniques.
6.
In a borax bead flame test, cobalt shows deep blue in both oxidizing and reducing flames.
7.
However, when needed, retardant can also be dropped directly onto flames to cool the fire and reduce flame length.
8.
The reducing flame is also called the "'carburizing flame "', since it tends to introduce carbon into the molten metal.
9.
The carbonizing flame will tend to remove the oxygen from iron oxides which may be present, a fact which has caused the flame to be known as a " reducing flame ".
10.
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.
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