† touch proofn.
Obsolete.
1. Printmaking. = touched proof n. at touched adj. and n. Compounds.
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society > leisure > the arts > visual arts > printmaking > engraving > [noun] > proof or state
proof1663
state1768
touch proof1831
1831 J. Constable Let. 27 Sept. in C. R. Leslie Mem. Life J. Constable (1845) xii. 214 You will be surprised and pleased with the touch proofs; they quite tempt one to proceed, so clever and artful is the devil.
1874 Illustr. London News 14 Mar. 255/3 ‘Venice’, engraved by W. Müller, 1837, a touch proof of which fetched £8 5s.
1900 H. Strachey Raphael iv. 76 The drawing of the Graces at Windsor is considered by Crowe and Cavalcaselle to be a ‘touch proof’ from the drawing at Chatsworth.
2. In sugar manufacture: a method of testing the stage of crystallization of a boiling sugar syrup, in which a drop of syrup is placed on the thumb and touched by the forefinger to see if a film containing crystals forms. rare.
ΘΚΠ
the world > food and drink > food > food manufacture and preparation > sugar manufacture > [noun] > process in manufacture
clay1765
claying1822
striking-tache1830
potting1839
strike1847
touch proof1909
turbinage1909
1909 Cent. Dict. Suppl. at String-proof Touch-proof or touch is the same test applied to the syrup at another stage in the boiling.
This entry has been updated (OED Third Edition, December 2016; most recently modified version published online June 2018).
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n.1831