Schwarz is the editor in chief of 4c, a trade magazine for print, design & digital media. 4c is being published in an edition for Austria and since 2013 also in an edition for Germany. The circulation for both editions: 11.000 copies. 4c is very much interested in involving its readers not only through surveys, but also with regular discussions with its readers on Twitter (called: #4ctalk), mainly on business topics, or workshops and conferences. Some of the exclusive stories 4c has published about the print media business were quoted in newspapers and magazines in the German speaking region.