For two centuries, Japan discouraged trade with the rest of the world. In the 1850s, however, the country finally bowed to outside pressure and opened its ports to foreign vessels and Western commercial interests. Japanese prints, lacquerware, and porcelains flooded into Europe, creating a craze for furniture and crafts of Japanese design. European artists were eager to abandon the staid conventions of academic art, and they freely imitated the bold, pure color, assertive outlines, and cropped compositions of Japanese prints. Japanese art created an indelible impression on Van Gogh. He, like many of his colleagues, avidly collected woodblock prints: "We like Japanese painting, we are influenced by it-all Impressionists have that in common."