Hello everybody at AMIA.
There is no need, and lots of disadvantages, to use tape for securing the end
of a film to the core.
You first have to practice a lot, using scraps of film, and old disposable
rolls, until you develop the dexterity to secure the end of the film by itself,
that is, by the friction of the film itself against the core.
Even using the slot in the core to crease the end of the film and catch it
there, can pose a risk, if you´re later rewinding this film roll in a
mechanical equipment, or simply projecting it. It might catch so strongly, that
perforations can be torn, or splices at the tail end can fail.
Laboratory and archival best practice is just to wind it tightly by hand, and
friction will take care of it... That is one of the reasons for a long enough
leader at the end of the roll.
Practice your winding, by hand, and in an electrical winder, until you feel
confident enough to handle the rolls in your valuable collection (all
collections are valuable to the person in charge).
Jose E. Llufrio
Formerly with ICAIC, Havana Cuba
Now Chemist at Technicolor East Coast, New York
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