When I started using film back in the 1960 era, the Kodak B&W film came in a foil pack with a cardboard sleve, as did the (original) Adox. Colour film came in aluminum cans. Kodak has made several variations on film cans.

The oldest ones were screw caped, and the film type was colour coded by the colour of the cap and the body of the can. but by the time I started the cans were unpainted and the Caps were Yellow. The next version was a stright sided Aluminum can with a Black Plastic cap. The cap had a Kodak Logo, and they logo came in a oval shaped spot that actually varied depending on the country of origin. (same code was apperently used for Super 8 Catriges)

The metal cans were fairly tight and sometimes could not accept an Ilford or Agfa Film. the p[acltic cans came next and were Grey with Black tops. still with the Kodak Logio indicating the origin. Then they had the "big K" logo. The colour scheme was reversed with a Black can and Grey top. (I do have a couple of Yellow cans from a promotion)

I think the translucent cans came at about the time that air travel was getting pasenger inspection. They allow the inspector to see that it has film and not something else. The Current cans have a real pattern on lower side of the lip, which makes them not seal as well, but is proably the modification mentioned above to make them easy to open.

I had an occasion where I was given a "naked" roll of film in the grey Kodak can, and was surprised that it was not fogged.

*the Cassettes themselves*

It is worth noting that in the 1960 era, Kodak also invented the "staked" cassette. where the end caps are crimped in place. before then the caps were only held on with the springiness of the meatl and a dropped roll of film was likley to have an end cap come off. The crimping prevents this. (I have also heard it sugested that this prevents someone from collecting old cassettes - relaoding them and passing the film off as new)

It took several years before Kodak Limited addoped the Crimp on caps.

Ansco, and ferania also had the snap off ends. Agfa and Ilford used a convex cap which was slightly harder to remove.

Perhaps funnier was the first roll of Fuji Neopan SS I ever bought. it came ina dark green can with a plastic top, but the top was pressed on the bottom of the can.. The whole assembly was then sealed in foil. once you used the film, the cap could be sliped off the bottom or the can and put on the top to protect the film from dust and such. The cap was lighter green and said Fuji FIlm. Fuji, Konica film also came with a snap off (reusable) cassette.

*The seal*

The older Plactic cans were resonably air tight.

*The winner* is proably Ilford. I don't know if the cans used for FP4 are light tight with the grey cap. I suspect the ones with the Black cap are. I do miss the Yellow blue and green caps that Ilford formerly used, but they were definatly not light tight.