1) Artistic technique 
Froissage is a method of collage developed by Czech artist Ladislav Novák in which the lines made by crumpling up a piece of paper are used to create a drawing. One major exponent of the art of froissage is Jiří Kolář. In his lifetime, Kolář acquired a reputation as one of the most inventive 20th-century Czech artists. A member of Group 42 ...