What is pigment?
Refers to a material that alters the color of light that's transmitted or reflected due to selective absorption of wavelength. This process however, differs from phosphorescence, fluorescence and other luminescence forms where materials emit light. Materials chosen and developed by humans for use in art as pigments have special properties in most cases that make them the best for use in coloring materials. A pigment's tinting strength should be relatively high in relation to the material to be colored.
Gutai were the group of Japanese radical artists who formed the Gutai Art Association in 1954. The word gutai is translated to mean embodiment. They created art on the spot for audiences, including their own physical movements; throwing paint, piercing paper and rolling in mud.