A large package of Sumi ink, especially for large-scale users among us. Kuretake Sumi ink is a great black ink that is often used for calligraphy. The ink is pitch black and has a nice consistency for writing. This makes Sumi ink very nice to use for beginners. It may be that your Sumi ink gets thicker after a while. You can then dilute it with some water. If you want to store the Sumi ink for a while, it is smart to use mineral water when diluting the ink.
To make the ink easy to use, buy an empty ink jar. Then you can easily dip into the ink with your pen, even with an oblique pen holder.