Tough pitch definitions

Tough-pitch

• (n.) The exact state or quality of texture and consistency of well reduced and refined copper. • (n.) Copper so reduced; -- called also tough-cake.
Found on http://thinkexist.com/dictionary/meaning/tough-pitch/

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Tough-pitch

Tough'-pitch` noun (Metal.) (a) The exact state or quality of texture and consistency of well reduced and refined copper. (b) Copper so reduced; -- called also tough-cake .
Found on http://www.encyclo.co.uk/webster/T/76

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Tough pitch

Copper which has its oxygen content controlled to give it the best electrical characteristics is said to be tough pitch.
Found on http://www.metalbulletin.com/Glossary.html

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