RPM International Inc. acquired the daylight fluorescent, phosphorescent and thermochromatic pigments business of The Dane Group. Located in Manchester, England, this business has annual revenues of approximately $20 million. Terms were not disclosed.      “Dane will operate as a stand-alone entrepreneurial business within our Day-Glo Group of companies and will continue to be led by Operations Manager Fintan McGrath and his capable management team,” said Stephen J. Knoop, RPM’s senior vice pr...