An iron oxide called hematite improves tone, and acetylglucosamine, an enzyme derived from sugar, exfoliates for extra glow.
It has a tendency to chalk, but this may be overcome by admixture with other pigments such as zinc oxide and iron oxide.
He did this with a pinch of ignition powder placed on the top of his pile of iron oxide and aluminum.
Silica is easily attacked by alkalis and by lime, less readily by copper oxide, and still less by iron oxide.
The negative element190 was iron oxide, with potassium hydrate as the electrolyte.
A fine siliceous material discolored by iron oxide, acts as a cement between the grains.
This slag is formed by melting lime and iron oxide, with a little silica sand if need be.
This iron oxide, or rust, is therefore the result of a chemical action between the iron and the oxygen.
We still use the old familiar purifying agents, iron oxide, lime and nascent calcium.
Common impurities in gypsum deposits include clay and lime carbonate, and also magnesia, silica, and iron oxide.
|iron oxide |
Any of various oxides of iron, such as ferric oxide or ferrous oxide.
|ferric oxide |
A reddish-brown to silver or black compound which occurs naturally as the mineral hematite and as rust. It is often used as a pigment and a metal polish. Chemical formula: Fe2O3.