From my 35mm film reloading days I use black india ink and a fine pen to mark the numbers on the film border. The ink is made by rapidograph and is called "rapidraw 3084-F". I mark them when on the light table.Originally Posted by bobfowler
I also intend on having a small roll of 1/2in masking tape on hand to seal the rolls. I found these black 120 storage tubes from Porters Camera that work well to seal the film and keep light and dust out. A package of three is $3.50.