Contrasts of the Scale of Values
129. Having produced a scale of nine neutral values, including White and Black, the question arises as to the number of contrasts which it affords, and it is easy to see that the number is thirty-six.
The vertical lines in the following diagram indicate the possible contrasts of value in the Scale of Values. Counting the lines, we see that the number of contrasts is thirty-six. Producing these contrasts, we shall see what each one amounts to.