dead soft, ie: pure copper has a Brinel hardness, according to Veral Smith's book, of 35. Hardened (antimony/lead/arsenic) WW, if hardened at 5F degrees below 'slump' temperature, can, 12 hours after quenching, attain a Brinel hardness of 34. Over time, they will then age-soften to approx. Brinel 25. For comparison, NEW Linotype has a Brinel hardness of 22.