For years, the workers at the Iranian printing house spewed out posters with state propaganda calling for “Death to America” and resistance to the West. Now, in the aftermath of the temporary nuclear agreement reached last month between Iran and the world powers — and the lifting of some of the economic sanctions that have crippled Iran’s economy — they have their eye on a new market: Christmas cards for Iranian companies that want to reach out once again to their international contacts. “We are seeing a light at the end of the tunnel,” said Ali Sabzevari, one of the company’s employees, who said the company was flooded with orders for greeting cards after the deal. “We all want to be part of the world again.”