Prints are made from a reversed negative on the sensitized surface of the stone, or on as many stones as the color-plates require, and then manipulated by the lithographer, who adds or modifies strength with his "tusche" or crayon, and scrapes or washes out lights where necessary.    From Wordnik.com.  [The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing] Reference

The materials which he used for his acid-resisting mixture while etching his copper plates were beeswax, soap, and lampblack, and in selecting these materials he accidentally invented the basis for all crayons or lithographic "tusche" or inks, now used so extensively for drawing on stone.    From Wordnik.com.  [The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing] Reference

"Now let me look at your tusche," he said as he stuck his gloved finger inside.    From Wordnik.com.  [Ester Amy Fischer: Killing Me Softly with Healthcare: How I Was Nearly "Terminated" By My Health Insurance Company] Reference

Parnell, by saying nice things about it, is simply covering his tusche in an election year for his earlier support of a bad idea.    From Wordnik.com.  [Sean Parnell Pushes Changes to Alaska’s Controversial Energy Tax - Vladimir’s blog - RedState] Reference

This being completed, the lithographic ink (tusche) or transfer ink is carefully rubbed into the tracing, which is laid face down on a polished lithographic stone, slightly moistened, and passed through a hand press; thereby transferring the ink from the engraved lines to the polished surface of the stone.    From Wordnik.com.  [The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing] Reference

He proceeds to draw each color-plate successively, at all times adhering closely to the red chalk outlines, filling in with tusche where full strength of the color is required and using lithographic crayon or the stipple process to reproduce the various gradations of this color in order to secure the full color value of each printing.    From Wordnik.com.  [The Building of a Book A Series of Practical Articles Written by Experts in the Various Departments of Book Making and Distributing] Reference