Greeting cards were popularized in the United States in the 1880s, when offset lithography made them inexpensive. Louis Prang was one of the first American printers to make a name for himself in the greeting-card business, but he was undercut by numerous English companies, who exported their cheaper cards to the States. Folded greeting cards appeared around 1910, the same year Hallmark was founded. When folding was added to the older...Continue Reading