In the 1930s, George Rumrill sold Niloak and Camark pottery through his own firm, Arkansas Products Co. He changed the name of his company to Rum Rill Art Pottery in 1933 and started selling pottery he designed himself. Rumrill's designs were produced at the Red Wing Pottery of Red Wing, Minn., until 1938, when he ended his association with Red Wing. After that, Rumrill's creations were made by Shawnee Pottery of Zanesville, Ohio, and Florence Pottery Co. of Mt. Gilead, Ohio. Florence Pottery burned down in 1941. Rumrill pottery was then produced by Gonder Ceramic Arts of South Zanesville, Ohio, until 1942, when George Rumrill died.
Redwing, through Rumrill, reintroduced new shapes using old molds. New artware pieces were created and added to the line. The number of finishes offered was expanded and a line of "blended glazes" was introduced. Most importantly, Rumrill cleaverly catagorized the fledgling but growing line into sales groupings he called by creative names such as "Classic Group," the "Fern Group," and the "Fluted Group." Probably just as important, the wares no longer bore the name Red Wing; while they were produced at Red Wing, the wares were all labeled and sold as RumRill (sic) Pottery.
A new era in the marketing of Red Wing artware had been born. Sales increased. Lines were expanded and then expanded again. Twice a year new finishes were introduced.
Then around early 1938 the Red Wing/Rumrill relationship was disolved. The reasons for this have never been adequately researched. But Rumrill moved on to have his wares produced by other potteries, became ill and eventually died causing the failure of his business.