the cap sealed on either side protects the quality of ink so that it is not dissolved with water or other chemical and decrease in quality....

you can easily choose a colored marker and start giving color to your imaginations. these markers can be chosen on the basis of number of colors, airbrush compatibility, ink capacity and nib types....

moreover, the ink is alcohol based and is permanent and non-toxic. therefore, the layers of the marker ink work superfine even when given a second coat and becomes more saturated....