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Pointillism (About 1883).
Also named divisionnism this pictorial technique, near to the impressionists who split up already their keys in small spots of sharp color, consists in employing only the primary colours of the spectrum burst in small points which the eye organizes and reconstitutes in identifiable object when it looks at them by far. George Seurat develops this technique while being based on the studies of the light of the chemist Eugene Chevreul (1786-1889). Each zone of color thus breaks up into an infinity of coloured particles whose complementary contrasts are based on the retina thus giving the impression of degraded nuances and tone.