A significant contributor to crayon history is Albert Henry Munsell, the professor who did scientific experiments in color that led to his published 1905 “A Color Notation” work. He created the Munsell Color System in 1915 and started his own Munsell Color Company in 1917. Initially he produced high quality coloring crayons through Wadsworth, Howland & Co. as early as 1906 and then later through his own company. Later sold.