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Hammer Hardening

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Hammer Hardening

A named shop tool lemma (Hammer Hardening) drawn from public-domain workshop and apparel speech.

Hammer Hardening is historically related to Iron.
henley-formulas seats orphan hammer-hardening beside iron as a first craft peer — object speech, not a text-container or tradition dump.
from Gardner Dexter Hiscox (ed.) · Henley's Twentieth Century Formulas, Recipes and Processes, 1914 (Gutenberg #53143; PD in the USA)
historically related to · sourced · documented

sources

Henley's Twentieth Century Formulas, Recipes and Processes · Gardner Dexter Hiscox (ed.)
Gardner D. Hiscox (ed.), Henley's Twentieth Century Formulas, Recipes and Processes (1914).