Pottery Materials: Underglaze Six types, including Gosu (cobalt blue) Please be sure to read the profile as well. Gosu manufacturers, types, and weights: 1. Isekyu Ancient Gosu 50g 2. Isekyu Old Gosu 50g 3. Isekyu Sumi Gosu 50g 4. Isekyu Blue Gosu 50g 5. Yogyochi (Ceramics Area) High-Grade Gosu 50g 6. Isekyu Cobalt Oxide 50g (Note) High-Grade Gosu was purchased from a Yogyochi pottery supply store, so the manufacturer is unknown. Condition of the paints: ・These were purchased new a long time ago and have been continuously used, then divided into smaller portions. ・Perfect for those who want to try various colors or create their own unique blended paints.