Why 35mm?
Jan 29, 2020 21:49:44 #
rehess wrote:
I took a roll of 620 slides. They curled and waved, even when in frames, to a point I used 35mm from there on.
620 was amateur film. 120/220, 46mm long roll, and 70mm long roll films were used for professional applications. They have all, at various times, been available with a very flat polyester (Kodak Estar) base. Some had a retouchable emulsion surface.
120 transparencies were rarely projected unless mounted in glass mounts. Their principal use was for color separations used in commercial printing. For that, they were un-mounted for scanning or direct CMYK separations.
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