I'm slowly working up to having a well-working method of shooting 35mm in a 220 film back on my RB67, and part of the process design is to run the film from cassette to cassette, to allow unloading in daylight and, presumably, loading another roll (I expect to process all my own film for the foreseeable future).
To do this without fogging the last one or two already-exposed 65mm long frames when the film comes taut at the end, as well as to reduce the wastage at the beginning, I plan to splice leaders on my film. I have a roll of 35mm cine leader stock in hand, and have worked out a method of putting the leader on the tail end of commercial film (hint: the dark slide on the film magazine is your friend), but I need a way to accurately splice the leader. Sprocket spacing doesn't matter in this case, since the film is wrapped on smooth rollers and drives the fame counter by friction, but I need the splice to be correctly aligned (i.e. leader parallel to the film) and I need to be able to make the splice accurately and reliably in the dark (to avoid exposing the film tail).
I've thought about making up an alignment tool from poster board or mat board -- but if anyone knows of a better way to do this, I'd love to hear about it.
Also, am I correct in recalling that most 35mm films can fit up to about an extra foot (8 or so standard frames) of film into the cassette? The leader can hang out prior to loading, but there needs to be room for the tail inside the cassette.
To do this without fogging the last one or two already-exposed 65mm long frames when the film comes taut at the end, as well as to reduce the wastage at the beginning, I plan to splice leaders on my film. I have a roll of 35mm cine leader stock in hand, and have worked out a method of putting the leader on the tail end of commercial film (hint: the dark slide on the film magazine is your friend), but I need a way to accurately splice the leader. Sprocket spacing doesn't matter in this case, since the film is wrapped on smooth rollers and drives the fame counter by friction, but I need the splice to be correctly aligned (i.e. leader parallel to the film) and I need to be able to make the splice accurately and reliably in the dark (to avoid exposing the film tail).
I've thought about making up an alignment tool from poster board or mat board -- but if anyone knows of a better way to do this, I'd love to hear about it.
Also, am I correct in recalling that most 35mm films can fit up to about an extra foot (8 or so standard frames) of film into the cassette? The leader can hang out prior to loading, but there needs to be room for the tail inside the cassette.