While his painting career continued successfully through this period, as part owner of a bar Casas engaged heavily in graphic design, adopting the "art nouveau" style that would come to define "modernisme". He designed posters for the café, many of which depicted Romeu's gaunt visage. He also executed a series of advertisements for Codorniu, a brand of cava (or, as its ads of the time claimed, champagne) and anisette. Over the next decade, he would design poster ads for everything from cigarette papers to the "Enciclopèdia Espasa".