Category: ink...

a pigment or dye in a liquid "vehicle"
writing inks dating from c2500 BC in Egypt and China
Gutenberg's first inks were a mix of varnish or boiled linseed oil with lampblack
The palest ink is better than the best memory. (Chinese proverb)
Ink runs from the corners of my mouth. There is no happiness like mine. I have been eating poetry. (M. Strand)
ink made into words and pictures
The soul lies buried in the ink that writes. (J. Clare)