All pen and ink on the market can be used. Schneider 406 is a student pen. When using it, you need to use an ink absorber to add ink to the ink bag. Generally, all fountain pen inks on the market can be used. The common inks are as follows:

1. Japanese style : Platinum INKM-1200, Platinum INK-400, Baile INK30.

2. European series: Pelikan 4001, Lingmei T52, Schneider 6901, Aurora AR125.

3. American series: Gaoshi NB501, Parker QUINK, Catfish XF.

4. Domestic products: Hero 400, Ostrich 555, Morning Light 9001.