Ink pencil
Revision as of 07:06, 24 July 2013 by (username removed)
Description
A pencil that produced an unerasable, or indelible, line. Ink pencils were introduced in 1859. The writing lead, which contained silver nitrate in a clay matrix, was mounted in a wooden handle. The silver nitrate darkened with exposure to light.
Synonyms and Related Terms
indelible pencil; solid ink pen