As discussed for components, namely bleach, there are alternatives to kit or "official" C-41 chemistry. I am attaching a test image as example. The image is a direct scan (Nikon LS-3500) of a small portion (about 1/8 frame) of an image taken of the MacBeth chart and an 18% grey scale card. Processing was done using entirely scratch-mix alternative chemistry. Bleach was Fe-Ammonium EDTA. The particulars for this image are: Minolta 7000/50 mm f/1.7 lens illumination direct sunlight (6800' elevation) ASA-160 Portra NC ~1/8 frame scanned at 300 dpi/scaled and converted to .jpg attachment no scanning color corrections are applied Perhaps others would like to provide examples for discussion?