Meaning of sighten | Babel Free

Definitions

To add a fugitive colour to (a paste), to enable the printer to determine whether the figures are well-printed or not.

transitive

Examples

“The iron liquor should be sightened with logwood.”

“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.”

CEFR level