> go through the starch grains (still on the plate) This part is key to understanding. The plate with the starch-based colored mosaic is not simply a filter us

> go through the starch grains (still on the plate) This part is key to understanding. The plate with the starch-based colored mosaic is not simply a filter used upon capture to be removed after (as most filters are today), but also a filter to be used upon viewing. Since the same exact “filter” is used for both capturing and viewing of a given photograph, it allows the mosaic to be random, simplifying creation of the filter.