With its impact in the printing industry growing steadily, the Print Suppliers Group (PSG) has announced the addition of three new members. Reflecting the increasing need for modest-sized ink suppliers to combine their sourcing power, the growth of PSG brings member ink suppliers to around $70 million, up 40 percent from just a year ago.      “We’re enthusiastic about the group’s expansion,” said Dennis Curtin, PSG president. “PSG has tripled in size in the last three years, a big leap since o...