ST. JOHN, NEW BRUNSWICK—  Imperial Dade, a distributor of printing papers and janitorial supplies, announced the acquisition of Pro-Tech Sanitation, Ltd.Founding in 1997, Pro-Tech have been servicing its customers and providing them with a wide variety of janitorial supplies and cleaning equipment. Pro-Tech has a long operating history as a highly reputable distributor of janitorial supplies and services across Prince Edward Island to Nova Scotia and New Brunswick. Imperial Date formally Veritiv Canada is Canada's second largest paper merchant also sells janitorial and hygiene products print and foodservice packaging products. Unisource and Xepedex were renamed Veritiv when they merged in 2014. The transaction represents the 89th acquisition for Imperial Dade. Financial terms of the private transaction were not disclosed.