About Natural "Kon" (Navy Blue) Regarding the "Kon" (Navy Blue) in a test tube from Ebisuya in the early Showa era: This is a natural mineral pigment that exhibits the deepest and most subdued blue among the ultramarine family. It holds a very important position among the natural mineral pigments of the early Showa era. 〇 Color Characteristics It has a stronger blackness than ultramarine, a heavy and calm color. It's not as black as "black ultramarine," but it's a dark color within the ultramarine range. 〇 Uses It is used for night skies, dark colors of clothing, shadows, and serene scenes. 〇 About This Product The "Kon" from the early Showa era is a dark color layer obtained by crushing and water-sieving natural lapis lazuli. The particles are non-uniform, and it has the depth and fluctuation unique to natural materials. The texture is completely different from artificial ultramarine. The label of this product is printed with the character "岩" (rock/pigment) and handwritten with "13" and "紺" (Kon/Navy Blue). 〇 Capacity: 4.82g 〇 The label of Kyoto Ebisuya G材 (painting materials) at the time had a double red line frame on a white background, and names were engraved by hand or printed. * This product was received 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. * This product was received from a deceased Japanese painter who passed away 20 years ago at the age of 100. (Reference: AI Research Data) The photos and explanations are all that is available. Please examine them thoroughly, and we look forward to your purchase.