Step 8:
Trace the edge of the can onto the cardboard and cut out that circle; cover one side of the cardboard circle with black construction paper. This is the side that the film or darkroom paper will rest against. When you press the cardboard disk to the open end of the tube, the disk should be slightly larger than the opening of the tube. There is no need to seal this to the tube, it will have to be taken off each time you replace the film/ darkroom paper.
Trace the edge of the can onto the cardboard and cut out that circle; cover one side of the cardboard circle with black construction paper. This is the side that the film or darkroom paper will rest against. When you press the cardboard disk to the open end of the tube, the disk should be slightly larger than the opening of the tube. There is no need to seal this to the tube, it will have to be taken off each time you replace the film/ darkroom paper.
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