What is a blotch or spot of ink on a printed page, caused by the ink not being properly distributed. It is distinguished from a friar, or white spot caused by a deficiency of ink called?

monk — (Print.) A blotch or spot of ink on a printed page, caused by the ink not being properly distributed. It is distinguished from a friar, or white spot caused by a deficiency of ink. (Webster's 1913.)

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