Heinz has called for more talks with workers at its Wigan factory in a bid to resolve a pay dispute.
Members of the Unite union have staged three strikes in protest at pay increases which they say are below the rate of inflation.
Heinz says the two-year pay offer of 3.3% and 3% is one of the best deals in the country.
It has invited site union representatives to a meeting on Tuesday for further discussions.
The company met union officials before Christmas but the talks ended without agreement.