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Some general information on Kodak Instant cameras and film:

Kodak was the original manufacturer of Polaroid Instant film from 1963 until 1969. When Polaroid decided to make their own film, Kodak prepared a Kodak peel-apart instant film and its cameras. The project was ready in 1972. When Polaroid introduced integral film the same year, Kodak abandoned the project and started a new one for Kodak integral instant film. The film and the cameras were introduced in 1976. Polaroid sued them for patent infringement although the Kodak system was quite different. The Kodak film was exposed via the back, so no mirror was necessary. The negative was then shielded by a black layer. The colours diffunded to the front. This film had a higher resolution than Polaroid film as only a few layers were necessary. With the 1984 Trimprint film you could even separate the picture layer from the negative layer. Kodak lost the lawsuit in 1986 which most probably would not have been the case by today's legal standards. They retired from the market and bought their cameras back from their U.S. customers.

The 1976 Kodak Instant film was 160 ISO film. Some sources say it's 150 ISO, but I have cartridges which say 160 ISO on the label. It was called PR10 first and PR144-10 later. The second generation Kodamatic instant film in 1982 was 320 ISO (sometimes given as 300 ISO). It was labeled HS 144-10. Kodak first planned to release this film with 600 ISO sensibility, like the Polaroid 600 film, but then decided to go to 320 ISO for compatibility reasons. So either Kodak system could use both films by setting the lighten/darken control to high on Kodamatic cameras with old film or to low on older instant cameras with new film. Trimprint was Kodamatic ISO 320 film released in 1984 with the possibility to
separate the picture layer from the negative layer and to trim the picture to your needs.

Fuji introduced a system near to the Kodak system as Fotorama Instant in 1982, same picture size, nearly the same cartridge and 160 ISO as well. Picture quality was once more improved. This film was discontinued in the 1990s. They made two more systems, with the same picture size: System 800 and Instant ACE. Both are 800 ISO. The system 800 cartridges could be adapted to Kodak cameras, the ACE cartridges would require a picture transfer to a Kodak cassette. Both need a filter in front of a Kodak instant camera because of their high ISO. The film has been discontinued in 2010. Until Polaroid went bankrupt, Fuji kept to the Japanese and other Asian markets, so they were never sued by Polaroid. The Fuji Instax film is the successor of 800 and ACE film in new formats and has 800 ISO as well.

Both, Kodak and Fuji have no battery in their film pack. After the introduction of Polaroid Integral film there were numerous battery issues until Polaroid decided to make their own batteries. And still the batteries are a waste problem.

There is little technical information about Kodak Instant cameras. The manuals don't give any hint. It seems as if the first generation cameras were made in the U.S., in Canada and in the U.K.. The foldable Kodamatic cameras have also been produced in Germany, but I did not find the information who did it.

The lenses are mostly given as 100mm F 12.8. For the older and the simpler new cameras shutter speed seems to be 1/15 to 1/400 (250). There is a bit more information about the Kodamatic 970L and 980L: 3 apertures,
F 11, F 16 and F 27, so the lens was obviously a little more luminous. Shutter speeds from 1/4 to 1/150. These models also have the first thyristor flashes in instant cameras. No camera of this series has a tripod socket, as there are no real long shutter speeds.

Two photos of the 
Kodak cartridges:

To the left the Kodamatic ISO 320 cartridge, with its instructions, to the right an ISO 160 Kodak Instant cartridge.

The film side.