Color films be they positive or negative have a design / optimized color temperature where they render their designed in color balance.
Historically, to achieve the color balance/rendition designed into the film, precise-accurate-consistent light sources were used to achieve lighting color temperature needed by the film to be used. This coupled with CC filter tweaking and color densitometer testing of the film negative/positive can produce consistent, accurate color rendition as designed into the film. This is often no longer the common way color film is used today. Seems most color films both negative/positive are exposed using outdoor or variable "time of the day" color temperature sunlight.
~Note color temperature variations with time of day~
https://www.thelightingpractice.com/...dian-lighting/
This will alter the color balance of the film positive/negative added to the density of the film based on exposure time of the film.
Answer to this by some, fix it in Photoshop or similar software...
But, other factors dig in. Color rendition of the monitor, how software adjust color, ambient lighting in the work area and more...
Then comes making and viewing the print which is also affected by the light being used to view the color print. Color spectrum of the color print is also dependent on the basic colors used to make the print as they have a mixed color signature all their own. Print substrate and surface texture can also have an effect on color perception.
And.. the mind/brain compensates (there are emotional effects from color too) for color perception adding more variables to how any color print is perceived.
All this and more comes to mind anytime color prints are discussed. Question remains, how does any image maker "judge" color, what is the point of reference?
Bernice
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