The world's only digitally created printer control system that features a real person in the scene. Which, among a long list of things, will help you judge flesh tones with greater accuracy.

And with flesh patches for light and dark skin tones, it'll be even easier to get repeatable flesh tone readings. The TRUE35 System, our most popular set, is recommended for labs that do primarily 35mm work. The System consists of only 18 (marked with asterisks below) of the most popular film types. The negative strips consist of a normal exposure, a two f-stop underexposure, and a three f-stop over exposure frame. The set also includes a reference print, instructions, focus patch and four
set-up negatives on Kodak Gold Plus 100 ISO Film.  http://www.aperioninc.com