Joseph Martin Kronheim
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Joseph Martin Kronheim (1810–1896) was a German-born lithographer and wood engraver known for founding Kronheim & Co. and working with George Baxter.[1]

Kronheim & Co.
During the mid-1860s, Kronheim and Co. printed hundreds of biblical prints, adding to the firm's eventual total output of as many as 5000 different prints.[3]
Kronheim & Co. utilized the Baxter process to create prints. Kronheim's chief innovation in the field was the use of zinc instead of wood blocks, which reduced the amount of time needed to complete prints, but resulted in a less shiny finish.[3]
By 1855, thanks in large part to the firm's use of zinc blocks, Kronheim & Co. had produced over 1000 different prints, including some for the 1855 Paris Exhibition. After the exhibition, Kronheim sold his share of the business to Oscar Frauenknecht.[4]
Kronheim retired to Germany and attempted to set up other printing businesses, including an American one. However, these efforts failed, causing Kronheim to lose all of his investments. So, he rejoined Frauenknecht and his old firm, Kronheim & Co., but not as a partner. The firm expanded into Manchester and Glasgow.[4]
In 1875, due to the rise of steam power and steam lithography machines, Kronheim & Co. ceased using the Baxter process.[1]
Kronheim worked under Frauenknecht for Kronheim and Co. until 1887.[3]