Carrageenan each plant weighs approximately 1 kg. The "E. cottonii" variety has been reclassified as "Kappaphycus cottonii" by Maxwell Doty (1988), thereby introducing the genus "Kappaphycus", on the basis of the phycocolloids produced (namely kappa carrageenan). After harvest, the seaweed is dried, baled, and sent to the carrageenan manufacturer. There the seaweed is ground, sifted to remove impurities such as sand, and washed thoroughly. After treatment with hot alkali solution (e.g., 5–8% potassium hydroxide), the cellulose is removed from the carrageenan by centrifugation and filtration. The resulting carrageenan solution is then concentrated by evaporation. It is dried and ground to specification.
Purple Line (CTA) Express would return to the original Inner Loop routing on December 29. If a problem occurs between the Loop and the Fullerton station, the Purple Line is generally routed into the subway, following the Red Line to Roosevelt Road before returning north. For several years, inbound afternoon Purple Line Express trains stopped at Addison Street on the Red Line before weekday evening Chicago Cubs baseball games, in order to provide direct service to Wrigley Field for passengers from northern Chicago, Evanston and Skokie. However, trains had to cross over to the inner Red Line tracks, as there is no platform