Hydrite Chemical Co., an integrated manufacturer and supplier of industrial chemicals and related services, is celebrating its 90th anniversary in February 2019. On February 6, 1929, Hydrite started as a supplier to the tanning industry in Milwaukee, WI.     When the Great Depression hit, the previous owners of Hydrite were looking to sell the company.  Seeing an opportunity, Wayne Thompson and Richard Honkamp left their jobs in 1935 and purchased a majority share in Hydrite. The evoluti...