Typograph_composition_kettle_-_section.png

Description
English: A kettle used for making "composition", a mixture of glue and molasses or treacle and later glycerin, which was poured out to make rollers for inking type in letterpress printing. The ink adhesion and flexibility properties of a composition roller meant that it was more suitable than either leather or rubber for its purpose.
Key: A = inner boiler filled with composition. B = outer boiler filled with water. C = pouring spout.
Date
Source Derived from an illustration on page 43 of Oscar H. Harpel's Harpel's Typograph . Cincinnati, OH: by author (as is typical of printing books). Derived from a digital scan at https://archive.org/details/harpelstypograph00harp
Author Book by Oscar H. Harpel. No engravers signature; engravings were by number of engravers listed at the end of the book; possibly "B.B Chamberlin", "Stillman & Adams", "Bogart & Stillman" (see pp. 248-249 for complete list) .
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( Reusing this file )
Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office ) before January 1, 1929.
Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Typograph_composition_kettle_-_section.png

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