Kala are a Taiwanese ink brand, best known for their water-resistant pigmented Nostalgia. Sweet Potato Balls is a standard dye-based fountain pen ink from their Island No. 38 line. In Taiwan it’s about $8USD/30ml, in the US it’s $21. I assume it’s more expensive in Europe/South America. I bought this ink almost four years ago from JetPens, when a bottle was $13.
Sweet Potato Balls is a shading orange, slightly muted and unsaturated. Similar inks I’ve tried include
- Lamy Bronze
Here are samples with a Benu Euphoria B on these papers:
This ink is on the dryer side and shades very well. It does feather a bit on some paper, and the cost has gone up significantly, so I don’t think I’ll be re-purchasing it.