In 1997, Trade-Net sold a laundry ball product (the Blue Laundry Ball) in various states. Trade-Net claimed that the blue liquid inside their balls was structured water "that emits a negative charge through the walls of the container into your laundry water". "This causes the water molecule cluster to disassociate, allowing much smaller individual water molecules to penetrate into the innermost part of the fabric." Dennis Barnum, a professor of inorganic chemistry at Portland State University, said that the liquid was just water with a blue dye and could not possibly have the effect claimed by the manufacturer. Barnum also said that the claims were "gibberish" and used scientific terms in ways that sounded educated to the layman but did not make any real sense. "The Oregonian" tested the balls and found they washed marginally better than hot water with no detergent, and worse than using detergent.