…Polaroid Instant slide films - 35mm. Processed with the “Autoprocessor”, sold by Polaroid. It could be the highlight of a long day outside, if you develop the film on a cozy evening, surrounded by astonished friends, wondering about the purpose of all this ancient stuff on the kitchentable.
Since these films are one of the most “athmospheric” emulsions ever, they are not made for scanning, rather than for watching with a slide projector. Especially the “Polachrome” type, you see on this page. On a Drumscanner, film usually is scanned emulsionside down. If you do this with Polachrome, the result is something like you see in this section. Lots of Moirè an Newton rings, and if you zoom in, you will see the vertical colour filter lines of this special film. The Rochester Institute of Technology has an old study online (1985) to clear up with this pain and how to scan this film without all this accidents. The biggest effect to scanquality was to face up the emulsion (oil mounted) and the right direction. My personal experience on a Drumscanner is, considering the steps above, that the use of light defocus has a huge effect to the result.
I had 3 Types in use: Polachrome (color), Polapan (b/w) and Polagraph HC (b/w).
These days it is hard to get a filmpackage for a reasonable price and they will be long expired, back to the 80´s or early 90´s. But still useable, if you know how……even today, an adventure!!