A photosensitive composition is described, comprising an electron donative chromatic organic compound, and a photoactivator selected from the group consisting of an aromatic halonium salt, an aromatic onium salt of elements belonging to Group Via in the periodic table and aromatic onium salt of elements belonging to Group Va in the periodic table, preferably further comprising at least one of a compound having oxyethylene groups and/or basic fine powder, and a compound having alcoholic hydroxy groups.
The photosensitive compositions have abundant kinds of color productions, and are superior in heat-proof, humidity-proof, and preservation properties.