Suminagashi, the 12th-century Japanese art of "floating ink," relies on highly absorbent, unsized paper to capture delicate swirling patterns from the water's surface. For the best results, artists use (Japanese handmade paper), specifically varieties like Hosho , Kozo , and Gasen , which are porous enough to soak up the ink instantly without the need for chemical thickeners in the water. Where to Buy Suminagashi Paper
You can find specialized Suminagashi paper and kits through several dedicated art suppliers and online marketplaces: Suminagashi Supplies - Yasutomo buy suminagashi paper