stain
noun
a discoloration produced by foreign matter having penetrated into or chemically reacted with a material; a spot not easily removed.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Judging from the appearance of the place, in spite of the ink marks and well-stained blotting-paper, there was not much work carried on there, though, of course, I could not judge that then.
From The Story of Antony Grace by George Manville Fenn