Paper bag and coated and treated paper manufacturing

Converting is the healthy end of paper: boxes follow e-commerce and food, the work is regional because nobody ships empty boxes far, and the entry point is modest. A sheet plant buys corrugated sheet, then prints, die-cuts and glues it into boxes for local manufacturers — no corrugator, no mill. The pre-screen's 'converting plant with long payback' overstates the capital for that model. What the screen finds instead is that the entrant's supplier is its competitor. Containerboard and corrugated sheet come from integrated companies that run their own box plants in the same region. Cascades is the Canadian example: its Packaging Products segment — which since January 2025 has held the former Containerboard and Specialty Products activities, mills and converting plants together — had C$3,079M of sales and C$496M of EBITDA (A) in 2025, about 16% of sales [A]. That margin is earned across the chain; the integrated producer can take it at the mill and price boxes thinly, or the reverse, and in a tight board market it supplies its own plants first. An independent has the converting margin only, on sheet bought at a price its rival sets. The incumbents are not vulnerable in the way an entrant needs: they are consolidating (the group's size bands are heavy — 156 of 406 establishments employ fifty or more [A], and half the plants are in Ontario), and the accounts worth having run on multi-year supply agreements. Independents survive on short runs, fast turnaround and specialty work the integrated plants do not want; that niche is real and this screen does not size it — no figure for independent sheet-plant margins was found. Bags, stationery, tissue converting and the rest of the code were not examined.