objectCopper SheetObjectsA named craft tool / part lemma (Copper Sheet) drawn from public-domain workshop speech (smith / watch / coach / harness / shoe / finish / pottery / glue / paint).Copper Sheet is historically related to Iron.working-metals seats orphan copper-sheet beside iron as a first craft peer — object speech, not a text-container or tradition dump.from Charles Conrad Sleffel (ed. PD) · The Library of Work and Play: Working in Metals, PD Gutenberg #45004historically related to · sourced · documentedsourcesThe Library of Work and Play: Working in Metals · Charles Conrad Sleffel (ed. PD)Working in Metals (PD Gutenberg #45004).