Dimensioni dei file:
38,6 MB (804,4 KB Download compresso)
Apri il file immagine a tutto schermo usando il software di elaborazione delle immagini.
Dimensioni:
3600 x 3744 px | 30,5 x 31,7 cm | 12 x 12,5 inches | 300dpi
Data acquisizione:
24 giugno 2016
Altre informazioni:
Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.
Chromatic diagram. Each dark line on this diagram represents a different color, the lighter lines are mixtures of the two encompassing darker lines. The 20 marks on each line are degrees of graduation; changes from brightness (center) to darkness (outer edge). Complementary colors are next to each other. Chromatic diagrams help to show how the perception of a color changes depending upon its surrounding colors. Michel Eugène Chevreul (August 31 1786 - April 9, 1889) was a French chemist whose work with fatty acids led to early applications in the fields of art and science. He is credited with the discovery of margaric acid, creatine, and designing an early form of soap made from animal fats and salt. In 1813 Chevreul was appointed professor of chemistry at the Lycée Charlemagne, and subsequently undertook the directorship of the Gobelins tapestry works, where he carried out his research on color contrasts. In 1839, he published the results under the title De la loi du contraste simultané des couleurs( The Principles of Harmony and Contrast of Colors). He lived to 102 and was a pioneer in the field of gerontology. He is also one of the 72 people whose names are inscribed on the Eiffel Tower.
