Dolan said in this week's issue of PrintWeek that Unite had "brought nothing constructive to the table" and that once a local level agreement was reached, "the union's national office continued to agitate for further concessions".
Unite responded, claiming that Dolan has "again intervened to scupper a settlement to a dispute over changes to pay and conditions".
Unite is now waiting on feedback from the company to a revised set of work conditions, which it returned to the company.
The union said Dolan has re-written the terms of a settlement and added a variety of further cuts to elements of pay, conditions and working arrangements.
They added that Somerset-based Butler & Tanner had retracted a previous offer made by the company that Unite members at the plant had voted on and accepted.
According to Unite, employees at the book printer now have until 14 April to vote on ballot papers for industrial action.
Unite national officer for the print sector Ann Field told printweek.com: "At present we are waiting for Butler & Tanner to respond to us."
She added that: "The workforce is shocked with the way that senior management has dealt with the situation."
"The employees want to do as much as they can to help the company but the management's approach is not helpful," said Field.
Dolan said though that with Unite publicising private talks and "wielding their blunt instrument of strike action" has made the company unwilling to invest in a printer that has such a strong union presence in the future.
"By their ill thought actions they have scored a major own goal," he added.
