Talk:28 mm film

slit film?[edit]

It says "it would be uneconomical to slit 35 mm nitrate film." Unfortunately, it links to nothing to explain what it means by that, and Wiktionary has no appropriate definition of slit.--Prosfilaes (talk) 10:30, 24 April 2012 (UTC)[reply]

As the guage reduces from 35mm it becomes less economical to slit 35mm film to produce the required film. 28mm is the size where slitting is the most uneconomical. 27mm would be no good as the left over part would be 8mm wide and therefore useable making such slitting economical again (Like 28mm, the 8mm format was also specified to be a format in which nitrate film was unobtainable). The economics of slitting film was dictated by the fact that nitrate film was cheaper than acitate based stocks. I B Wright (talk) 13:38, 31 December 2012 (UTC)[reply]

And? What does "slit" mean?--Prosfilaes (talk) 20:09, 31 December 2012 (UTC)[reply]

Standard term for dividing a film into two smaller widths. Basically you pass a film through two guides and a razor blade such that a width of film is turned into two smaller widths that sum to the original. In the case in point: 35mm film can be slit into 27mm film and 8mm film. Or it can be slit into 28mm film and 7mm film. As there is no 7mm (or smaller) format, the smaller part, in this case, has to be discarded. I B Wright (talk) 14:17, 2 January 2013 (UTC)[reply]