1) Cassette tape coating 2) Iron oxide pigment 3) Magnetic-tape coating 4) Rust 5) Rust, basically
Found on
https://www.crosswordclues.com/clue/iron-oxide
Iron oxides are chemical compounds composed of iron and oxygen. All together, there are sixteen known iron oxides and oxyhydroxides. Iron oxides and oxide-hydroxides are widespread in nature, play an important role in many geological and biological processes, and are widely used by humans, e.g., as iron ores, pigments, catalysts, in thermite (see ...
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http://en.wikipedia.org/wiki/Iron_oxide
(from the article `iron`) ...powder used primarily as a pigment for glasses. It occurs in nature as the mineral wuestite and it can be prepared by heating a ferrous compound ... [5 related articles]
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http://www.britannica.com/eb/a-z/i/40
This material as prepared for foundry use generally contains about 85% ferric oxide and is produced by pulverizing a high grade of pure iron ore. It can be added to core sand mixes to assist in keeping the core from cracking before the metal solidifies during the casting operation and also helps to resist metal penetration during this period. Added...
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https://steelforge.com/literature/steelog-the-5000-word-metals-glossary/
A reddish-brown compound of iron and oxygen, commonly known as rust, and seen on the surface of iron objects.
Found on
https://www.encyclo.co.uk/local/22733
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