tone-scale neutrality and line

The ability of a film to reproduce truly neutral gray tones from black to white (this is a function of how the contrast ratio from red to green to blue in the negative aligns with the ratios in the print). Closely correlated is the linearity of the film s characteristic curve in all three-color records from shadows to highlights. Poor linearity can lead to poor neutrality in smaller ranges of the tone-scale. Performance here can also be related to flesh-to-neutral reproduction and film latitude.