He conceded that Amcor had lost market share in the Australian corrugated box market to Dick Pratt's Visy Industries but indicated that Amcor was determined to win it back and was prepared to build modern plants to do it. "We are going to ensure that we have a strong competitive position going forward, and you can't do that with a pair of 40-year-old mills. "We are committed to the corrugated box market," he said, signalling an escalation of the constant battle between Amcor and Visy in that market.