2. Examples and data
2.1 Copper alloys
Copper alloys are numerous, and their natural color ranges from red (pure or low-alloy copper) to gold (Cu-Zn brass, the "orichalcum" of the ancients), through various shades of yellow (Cu-Sn bronzes) and pink (low-alloy bronzes).
These are certainly the metal alloys for which the notion of patina, whether natural or intentional, has been the most widespread and appreciated. This is due to their widespread use in artistic creation since antiquity
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The Ultimate Scientific and Technical Reference
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Examples and data
References
Websites
Copper information center: http://www.cuivre.org
KME: http://www.thecopperlink.com
Office technique pour l'application de l'acier: http://www.otua.org
VM zinc: http://www.vmzinc.com
Pewter passion: http://www.etainpassion.com
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