About 3,000 clerical workers are due to begin a week-long strike on Jan. 17, trade union Pro said, adding that a refusal to work overtime is due to start already on Tuesday.
The paper industry, including companies such as UPM (>> UPM-Kymmene Oyj), Stora Enso (>> Stora Enso Oyj) and Metsa Group, accounted for 22 percent of all Finnish exports in 2016.
(Reporting by Jussi Rosendahl, editing by Terje Solsvik)