sighten

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English[edit]

Etymology[edit]

From sight +‎ -en.

Verb[edit]

sighten (third-person singular simple present sightens, present participle sightening, simple past and past participle sightened)

  1. (transitive, calico-printing) To add a fugitive colour to (a paste), to enable the printer to determine whether the figures are well-printed or not.
    • 1830, Samuel Frederick Gray, The Chemistry of the Arts:
      The iron liquor should be sightened with logwood.
    • 1849, Edward Andrew Parnell, Dyeing and Calico-printing, page 132:
      Annexed is a specimen of calico in this stage of the process, the mordant on which is red liquor, “sightened” with a little decoction of peach-wood or similar dye-stuff.

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