Gums are natural components derived from the exudation of trees or shrubs. They have the peculiarity, unlike resins, of being soluble in water. They are used as a binder for watercolor and gouache, as a binder additive for tempera and as an agglutinant for pastel: they dissolve in water. best use in printing relief design our sandaraq is hand ^picked hand cleaned selected only the natural gum for direct use in printing industry.