On Sun, 30 Jul 2017, Paul Koning via cctalk wrote:
On 8 mm types: there's the original 8 mm (later called "double 8" because the unexposed film is essentially 16 mm film which is exposed on one side, flipped over, and exposed on the other side, then slit in half to make 8 mm finished film).
That 16mm film is reporforated - twice as many sprocket holes as "normal 16mm". It can be made from 16mm by anybody who has a light-tight perforator (not many around)
I think that I know where my developing tanks are, but no idea where my splitter is. THAT is easy to make a replacemnt.
Then there is super 8, which is a different format entirely. Around the time super 8 was introduced, some company came out with yet a third format called "single 8". I haven't seen that lately, and I don't know anything about how it relates to the other two. If I remember right, it came in a casette with the two spools enclosed in a single figure 8 shaped enclosure, for ease in handling.
There was a single 8mm that was pre-split before exposure. That disappeared when Kodak dropped it. There was also a variant super-8 that used a figure 8 cartridge, instead of the usual coaxial cartridge.
