De rubí sintético

The pointillism (or neo-impressionism or divisionnism ) is a technique of Peinture resulting from the impressionist movement which consists in painting by separate small keys of painting of Couleur S primary educations. One perceives nevertheless secondary colors, by the mixture Optique of only the three different ones tons. This technique was born in France in particular under the impulse from Georges Seurat (1859 - 1891) then from Paul Signac (1863 - 1935), at the end of the 19th century.

History

The term of “neo-impressionism” is employed for the first time by Felix Fénéon, an Critic art . The first works however go back to 1884, with in particular the bathe with Asnières of Seurat, exposed to the first living room of the independent artists. Its apogee corresponds at the end of the 19th century, but its influence feels thereafter at the fawn-coloured until the German expressionnists and with the sources of the Abstraction (the first works of Wilhem Morgner or Wassily Kandinsky).

The neo-impressionism constituted a pictorial movement with its defenders (of which the Fénéon critic), his followers and its places of exposure. It was diffused quickly in Belgium with the school luminist whose Théo van Rysselberghe and Henry Van de Velde is the most known members. This last allowed the expansion of the movement towards the Germany.

Theory

When the table is looked at a certain distance, the spots of color cannot be distinguished from/to each other and are based the ones with the others optically. The visual aspect obtained is different from that obtained by mixing colors on a pallet and by then applying them to the fabric. Some describe the result like more shining or purer because the mixture is carried out by the eye and either by the brush.

The explanation could be related to the theories on the additivity and the soustractivity of the colors: usually, when colors are produced by a mixture of pigments, the soustractivity plays (each pigment absorbs a whole of frequencies of the luminous spectrum, the mixture of the pigments returns the whole of the not absorptive frequencies). Thus, to mix pigments of cyan, magenta and yellow (subtractive primary colors) produced a color close to the black. On the other hand, when one mixes colors produced by sources of light, it is the additivity which plays: the mixture of faisceux luminous of the three colors red, green and blue produces a light close to the white since the whole of the visible frequencies is represented. The TV screens, for example, use this system.

This theorization is from the start exploited by the founders of the movement: Seurat takes as a starting point the work on the color of Eugene Chevreul and Charles Henry.

Mathematics

Discipline maths the purpose of which is Iso to distribute points on a surface like a sphere (new algorithm very recent, after 2003), a torus. Applications: in particular the orbital atomic ones (sp2,…)

Internal bonds

• Law of the simultaneous contrast of the colors of Chevreul.

Random links:

Dino Risi | Philippe Zarifian | Sit of Drogheda | Museum of the Art schools d' Agen | Orube | À_spinelle