In order to overcome human eye colour determination inconsistencies, a chroma meter was used to correlate TOC with percentage reflectance, Munsell value
, Munsell chroma, sand percentage, clay percentage and particle size on moist and air-dried samples (Konen et al.
The Adams D15 has the same hues as the D15 but with Munsell value
5 and chroma 2.
A correlate of luminance Munsell Value
is considered as a vertical axis; Hue consists of five main segments, denoted Red, Yellow, Green, Blue and Purple; Chroma, a correlate of perceived chroma, is represented by the distance of a sample from the vertical axis.
Similarly, we compared the average measured and tabbed values for different Munsell value and chroma.
Each point on the [a.sup.*][b.sup.*] plane was averaged from the measured chromatic coordinates of the colour chips with the same Munsell hue and chroma notation (that is, the locus refers to a central Munsell value).