holmburgers
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Autochrome.
Grains are from 5-10 microns, 1700-2500 grains per linear inch
Dufaycolor.
Spacing of red lines = 533 lines per inch.
Finlay.
240 filter squares per square inch
Thames Screen Plate.
Each circle was 1/400 of an inch wide
From Wikipedia, Additive film (such as Polavision and Polachrome slide film) used a colour mask of microscopically thin transparent red, green, and blue lines (3000 lines per inch)
A significant improvement over the previous methods.
Elsewhere, "Polachrome"...has a color filter screen consisting of red, green and blue stripes with a resolution of 118 stripes/mm. All of these films are described in a publication "The Polaroid 35 mm Instant Slide System" by Samuel H. Liggero, Kenneth J. McCarthy and Joseph A. Stella.