Let's get rolling
Now that we have the 620 spools and a light-tight bag, let's roll some film. First, place the 620 spindle and 120 roll inside the light-tight coat bag by sliding your arms in through the sleeves. Then, tear the seal off of the 120 roll and unwind the film, letting it roll up on itself.

Next, place the tab on the end of the paper backing into the wide slot on the 620 spindle and out through the smaller slot, like in Figure E. Make sure the film is centered and roll it up on the spindle, keeping a slight amount of tension. When you're rolling up the paper backing, be sure that you don't miss the end of the film when it starts.

FIGURE E


Feed the paper backing into the wide slot of the 620 spool. Roll over picture for a larger image.

Because the 620 spool has a smaller diameter than the 120 spool, and because it's taped to the paper backing, the film will develop a hump as you get close to the end, which is actually the beginning of the roll. This is easily remedied by slipping your finger between the film and the backing, then sliding the tape loose from the backing as in Figure F. The film will then lay flat and the tape will reattach to the backing when the film is rolled up.

FIGURE F


Because of the difference in spool sizes, the film will hump toward the end. Roll over picture for a larger image.