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<p>[QUOTE="Ocatarinetabellatchitchix, post: 7401488, member: 99554"]It is believed that dies were generally carved into bronze using hardened sharp iron tools like chisels, scrapers, etc. Annealing techniques (common in metallurgy) could then be used to harden the bronze dies after engraving but before use - this process is performed by substantially heating the material (generally until glowing) for a while and allowing it to cool. The resultant harder annealed bronze die would then stand up better to use in striking softer bronze, silver and gold coins. Iron dies were used to strike the largest Greek silver coins, tetradrachms and dekadrachms, many of which show traces of die rust. Iron dies also had to be used to strike some large bronze coins, because their flans were harder than those of gold and silver coins.[/QUOTE]</p><p><br /></p>
[QUOTE="Ocatarinetabellatchitchix, post: 7401488, member: 99554"]It is believed that dies were generally carved into bronze using hardened sharp iron tools like chisels, scrapers, etc. Annealing techniques (common in metallurgy) could then be used to harden the bronze dies after engraving but before use - this process is performed by substantially heating the material (generally until glowing) for a while and allowing it to cool. The resultant harder annealed bronze die would then stand up better to use in striking softer bronze, silver and gold coins. Iron dies were used to strike the largest Greek silver coins, tetradrachms and dekadrachms, many of which show traces of die rust. Iron dies also had to be used to strike some large bronze coins, because their flans were harder than those of gold and silver coins.[/QUOTE]
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