Note  Ten in this case represents 100% or purest brightness moving down in increments of 1. One is 10%. Refer to Figure 2-42. Figure 2-42.  Munsell color diagram imagining color to be displayed as a perfect cylinder with many layers Before the age of computers, this system was developed by Professor Albert H. Munsell. Starting in 1905, he continued to work on this until his death in 1918 and was used later in the 1930s by the United States Department of Agriculture (USDA) as the official color system for soil research. However, soil or dirt is one of the basic forms of pigments used in ink, and so because Munsell’s…