The ferrous iron promotes maintenance of the iron oxide mineral.

The trivalent iron is reduced to divalent iron before a percipitation (C) of said divalent iron.

In the iron salts used the ratio between di- and trivalent iron is suitably such that magnetic iron oxide is formed directly.

Carbonyl iron provides iron in a form that significantly reduces the risk to children of accidental iron poisoning from formulations that provide iron in salt form.

The press plate is manufactured such that the plate's surface registers with the decorative motif when the press plate is hot.

Said water-soluble iron supply agent reduces trivalent iron to divalent iron ions and maintains the same in that state, and is capable of supplying water-soluble iron ions (divalent iron ions) stably over a long period.

As the copper sulphide leaches out, the trivalent iron is reduced to divalent and is oxidised back to trivalent by means of oxygen during leaching.

In the iron salts used the ratio between di- and trivalent iron is suitably such that magnetic iron oxide is formed directly.

The other three types are iron bacteria, organic iron and collodial iron.

This disclosure relates to detergent compositions containing tiron, a ligand capable of binding iron, an iron-displacing species, and iron.

An apparatus for manufacturing compacted iron includes at least one pair of molding rolls that compress fine iron and manufacture compacted iron.

The iron used in either the method or system may be a ferrous or ferric salt, or elemental iron.

The gluconate salt is added to the fluid along with an iron source if iron is not already in the fluid.

Plated or coated with lead, including terne-plate

Plated or coated with lead, including terne-plate