The Value of Kuro-Gunjo (Black Ultramarine) Ebisya's test tube-filled "Kuro-Gunjo" from the early Showa era is a high-grade pigment derived from azurite, exhibiting the darkest and deepest blue among the ultramarine-based mineral pigments. It holds a special position in the history of Japanese painting materials, surpassing others in terms of artistic, cultural, and antique value. 〇 Color Characteristics The darkest among ultramarine pigments, a deep blue close to black, with a heavy color that subtly suggests a hint of purple or ink within the blue. It is a strong blue, a deep and soft black. It has natural fluctuations. Deeper than "Kon" (navy blue) and "Bi-Gunjo" (beautiful ultramarine), it can be used for night skies, shadows, and solemn scenes. 〇 Applications Suitable for expressing spirituality and a sense of weight in landscape paintings and portraits, and is also ideal for depicting clothing, night scenes, deep mountain valleys, and mysterious spaces. 〇 About This Product Derived from Azurite: This product is made by water-based refining, selecting the heaviest particles (the darkest color). 〇 The original labels of Kyoto Ebisya Gazyai (art supplies) had a white background with a double red line frame, and the name was hand-written or printed. The label of this product has "11" and a rock printed on it, with "Kuro-Gunjo" written by hand. 〇 Capacity: 5.28g * This product was acquired from a deceased Japanese painter who passed away 20 years ago at the age of 100. Especially, the natural mineral pigments in test tubes from that time have antique value and are sometimes traded at high prices as research materials or collector's items. (From AI research data) The photos and descriptions are all that is available. We encourage you to fully examine them before making a purchase.