A spray system including an airbrush； one or more removable containers that are closed initially, and that each contain a composition for spraying onto human keratinous materials； and a junction device that connects the container to the airbrush, the device including at least a composition-outlet first orifice enabling the composition to leave the container in order to be sprayed via the airbrush, and at least an air-inlet second orifice enabling air intake by the container.
