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- Q4647863 subject Q7029389.
- Q4647863 subject Q8369095.
- Q4647863 abstract "A. Hoen & Co. was a Baltimore, Maryland-based lithography firm founded by Edward Weber in the 1840s as E. Weber & Company. When August Hoen took it over following Weber's death, he changed the name and built the company into one of the most prominent in the industry at the time.In 1877, Hoen entered a print produced by his patented lithocaustic process in the Centennial Exposition. This work, entitled "The Continentals" was "commended for excellence in chromo-lithographic art" by the judges.August Hoen patented his lithocaustic method (originally spelled lithokaustik) in 1860. This covered etching with a mix of citric acid and gum arabic so that the lithographer could see the progress of shaded patterns as they were etched into the stone. He continued to explore methods of producing fine gradations in shading. In 1880, August Hoen was granted several patents for a methods of producing halftone prints using lithography.Alfred Hoen, August's son, was not only an accomplished printmaker, but he also maintained a laboratory for testing lithographic limestone and carried out laboratory tests and experimental print runs using stones from promising new sources.".
- Q4647863 thumbnail Map_of_granites_and_gneisses_in_Maryland_Plate_VII_WBClark_1898.jpg?width=300.
- Q4647863 wikiPageExternalLink ahoen.shtml.
- Q4647863 wikiPageWikiLink Q1110021.
- Q4647863 wikiPageWikiLink Q133036.
- Q4647863 wikiPageWikiLink Q159683.
- Q4647863 wikiPageWikiLink Q2446174.
- Q4647863 wikiPageWikiLink Q5092.
- Q4647863 wikiPageWikiLink Q5335552.
- Q4647863 wikiPageWikiLink Q535814.
- Q4647863 wikiPageWikiLink Q6648021.
- Q4647863 wikiPageWikiLink Q7029389.
- Q4647863 wikiPageWikiLink Q8369095.
- Q4647863 wikiPageWikiLink Q984109.
- Q4647863 comment "A. Hoen & Co. was a Baltimore, Maryland-based lithography firm founded by Edward Weber in the 1840s as E. Weber & Company. When August Hoen took it over following Weber's death, he changed the name and built the company into one of the most prominent in the industry at the time.In 1877, Hoen entered a print produced by his patented lithocaustic process in the Centennial Exposition.".
- Q4647863 label "A. Hoen & Co.".
- Q4647863 depiction Map_of_granites_and_gneisses_in_Maryland_Plate_VII_WBClark_1898.jpg.