Stora Enso has decided to commence a feasibility study with the aim of expanding containerboard production at Ostrołęka Mill in Poland by 500 000 tonnes annually. The findings of a recently completed pre-feasibility study supported continuation of the process. The feasibility study, which is expected to be completed by the end of 2016, will evaluate the profitability of the possible expansion. The studied investment will be cost competitive and it has synergies with the newest containerboard machine in Ostrołęka, which went into production in 2013.