“The inherent lightness or darkness of a form - its local-tone - is a given quality of all forms. It is affected by, but separate from, the light and dark areas that result from light falling on forms.” LightFormFallGivenDarkResultsQualityDarknessAreasLocalsToneAffectedInherentLightnessLight And Dark Author:Nathan Goldstein
“The local-tone is the intrinsic value of a thing - excluding any effects of light. The local-tone of a common pearl is very nearly white; that of a lump of coal, nearly black.” LightValuesBlackWhiteCommonEffectsLocalsToneCoalPearlsLumpsIntrinsic Value Author:Nathan Goldstein