Impressionism was an art movement. Post-impressionism was never an art movement. More correctly "post-impressionist" was a time period. Their art work was too different from each other to fit into a movement. The goal of the earlier impressionists like Renoir, Pissaro, Monet was to show the effects of light on scenes. In impressionism the goal of a work was often to portray a scene accurately and objectively, but rather than focusing on copying it exactly the effects of light and color are the main focus.
Post- Impressionism was a later movement which rejected the goals of impressionism despite using a lot of the same forms of painting. Expressing the ideas of the painter became the new goal of the painting. Post-Impressionist artists, unlike their predecessors, were known to use heavy paint strokes and a broad range of diverse colours to convey emotion and placed more focus on creating geometric and/or distorted images and the role of colour.
The Dutch period of his work, 1880-85, consisted of dark and impasto (when paint is thick and often mixed directly on the canvas) studies of the disenfranchised people of society. The most famous of these is The Potato Eaters. The poverty and desperation Van Gogh was experiencing as an artist as well as the peasants’ horrible living conditions informed his painting.
But in 1890 despairing of his cure from mental illness, he shot himself in the chest. Although Vincent never made any money from his paintings, today his work sells for tens of millions of dollars. It is ironic that Vincent knew hardship and heartbreak during his life but became very successful after his death. Such is the reality for many great artists.
Paul Gauguin At first Paul Gauguin painted as a hobby while working as a stockbroker, until the stock market crashed in 1882. Turning to an art career Gauguin joined the Impressionists in style. He was dissatisfied with the purely visual emphasis of impressionism and attempted to a add more symbolism and spirituality to his artwork.
He eventually developed a new style which was influenced by his love of Japanese prints; he created paintings with bold splashes of color, bright streaks of unmixed paint, and simplified designs. Gauguin developed a fascination for exotic cultures, which was probably derived from his childhood memories of South America. In 1891 Gauguin moved to the French colony of Tahiti, where he created the paintings he is best known for today. Unfortunately he led a life of poverty in this area and his health deteriorated.
Pointillism ( /ˈpwɛntɨlɪzəm/) is a technique of painting in which small, distinct dots of pure colour are applied in patterns to form an image. Georges Seurat and Paul Signac developed the technique in 1886, branching from Impressionism. The term Pointillism was first coined by art critics in the late 1880s to ridicule the works of these artists, and is now used without its earlier mocking connotation. Neo-impressionism and Divisionism are also terms used to describe this technique of painting.