Freedom Paper (241BF) is a standard 20 lb. Fast Speed Blue-Line/Diazo paper. This Blue-Line Diazo paper is designed for use with your Diazo reproduction machine. It is compatible with a console and tabletop ammonia diazo machines. Freedom Paper's (241BF), Fast Speed Blue-Line/Diazo paper provides a blue image with great density and speed. Great for economical and efficient reproductions, especially when reproducing a large number of sheets. Available in sheets and rolls. We also carry Ultra Speed Blue-Line/Diazo paper, for your high productivity projects, see Freedom Paper (241BU).