24 vibrant colors including all the primary colors that artists need for drawing lines & details, painting, sketching, journaling, signing, illustrations, doodling, hand lettering, shading, manga and more. The marker comes with 36 frequently-used variety of vibrant colors that is good for coloring, illustrations, doodling, journaling, calligraphy and more. Shake the marker pens before first-time use or if they have not been used for a while. 2) Hold the marker pens upright to allow the ink to flow smoothly. 3) Close the caps tightly to prevent the ink from drying out. 4) Do not remove the caps forcefully. 5) If the ink does not flow, press the pen tip down for 2 minutes.