Complementary colours pigments

The staleness of reward reported by self-absorbed people makes one think of habituation or fatigue. Any neuronal process, if repeated frequently during a short period of time, wilt lose vigour. For instance, if one stares at a solid colour for any period of time the visual pigment that subtends that colour will be depleted so that if one then stares at a neutral screen one will see the complementary colour. Data about the generality of this phenomenon in psychophysiology have been summarized by Solomon (1980), who proposed an increasing recruitment... 

In the pigment circle (Fig. 22), a number of pigments are listed. The pigment colours do not correspond to pure colours, but lie between them. If two pigments that are not complementary are mixed, the colour produced will lie between them, on the shorter arc of circle... 

In addition, while powerful sophisticated molecular modelling methods are now available to assist in the design of new coloured molecules, the foresight to follow-up and exploit the fortuitous discovery of a coloured compound, perhaps as a trace impurity in a reaction, will remain a vital complementary element in the search for new dyes and pigments. 

Visible reflectance spectroscopy is used routinely to measure the colour of opaque objects such as textile fabrics, paint films and plastics for purposes such as colour matching and dye and pigment recipe prediction. There is now a wide range of commercially-available reflectance spectrophotometers used industrially as colour measurement devices for such purposes. In many ways, this technique may be considered as complementary to the use of visible absorption spectroscopy for the measurement of transparent dye solutions. Reflectance spectra of typical red, green and blue surfaces... 

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