The brassfounder's manual : instructions for the modelling, pattern-making, moulding, alloying, turning, filing, burnishing, bronzing, etc., etc. ... (1879)
Graham, Walter · London : Crosby Lockwood and Co. · leaf 39
, they are black- washed, or coated with a mixture of ground charcoal and water, a little clay or size being added ; they are returned to the stove to have this wash dried, after which they are ready for the mould. The black wash causes the core to leave the casting readily, and renders the surface… … Fig. 13.— Moulding Bells in Loam.. Large and heavy castings, such as large churcli bells, are moulded in loam. Q
Brass founders
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