Tray Attachment for Developing Films
Roller Attached to Tray for Use in Developing a Full-Length Film
An ordinary tray can be used for film development, when there is no tank at hand, by the use of the attachment shown in the sketch. It consists of a strip of sheet metal, or tin, bent to fit under the tray and up on both sides to provide bearings for a roller. The roller is made of hard rubber and should be of such size that its lower surface will be under the developer in the tray. The film is drawn back and forth under this roller.