Zeres, Inc., Bowling Green, OH, a manufacturer of flexographic printing inks for both wide web and shipping container applications, has introduced a pH neutral water-based ink.      Spectrastat, new from Zeres, remains pH and viscosity stable indefinitely, eliminating the need “We’ve generated tremendous excitement everywhere we’ve put Spectrastat on press,” said Tom Wilkinson, national sales manager with Zeres. “Operators are free to concentrate on up-time and the overall quality characteri...