We’ve marked three years since the Kingsport Mill’s conversion to a 100% recycled packaging mill was celebrated at its grand opening event, and it’s been nearly three and a half years since the first roll of containerboard was produced successfully at the mill. We asked Mike Butler, senior director of sales for Domtar’s packaging business, and Laura Ashley, channel marketing manager for packaging products, about Domtar’s packaging products and how the mill and product line are performing, three…