Format Dynamics, a Denver startup that optimizes advertising on a printed web page, has closed a $5.5 million second round of funding from a private investment group and existing investors. With its CleanPrint software, the company reformats online articles into a magazine style with targeted ads when printed. Format Dynamics creates both new revenue opportunities for publishers and increased exposure for advertisers. The company began working with Hearst Magazines in January. Other publishers that use the software include The Washington Post, The Wall Street Journal,  MSNBC and CNN Money.