† spaadn.
Mineralogy. Obsolete.
A variety of talc, gypsum, or spar, or a powder prepared from one or other of these, mainly used to form moulds for casting metal objects.
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the world > the earth > minerals > types of mineral > [noun] > white lamellar mineral
spar1581
spaad1594
spar-stone1694
spat1706
sugar-spar1730
spath1763
chesil spar1835
1594 H. Plat Diuers Chimicall Concl. Distillation 44, in Jewell House I haue seene oftentimes many good patternes of mettall, cast off very sharpely in spawde alone, but..you must sprincle the spawd with some moisture.
1651 J. French Art Distillation v. 172 He that casts them [sc. antimony cups] must be skilfull in making his spawde.
1686 R. Plot Nat. Hist. Staffs. iv. 154 [A sand] is sent for by Artists living at a great distance, and used by them as a spaud to cast Metalls with.
1728 J. Woodward Fossils All Kinds 14 English Talc, of which the coarser Sort is call'd Plaister, or Parget, the finer, Spaad, [or] Earth-Flax.
1738 E. Chambers Cycl. (ed. 2) Spaad,..is found pretty frequently in England and Germany;..the best is in long scales, very soft, and easily pulverized.
This entry has not yet been fully updated (first published 1913; most recently modified version published online December 2020).
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