Coloverse Iowa Corn Field Bottled Ink is inspired by the 50 states of the United States of America. Each ink is inspired by what each of these states are most known for ranging from an iconic color to landscape to iconic symbols to names. Packed in 15ml glass bottles, these colors will surely please. Premium quality materials The ink is made of globally recognized premium quality colorants.It is highly pure with vivid and clear colors.It also has exceptional solubility and great to use in premium fountain pens. Clean and safe natural materials The colorants and solvents of COLORVERSE ink uses plant-origin natural materialsinstead of high-molecular synthetic materials.Therefore, they are free of chemical odors such as alcohols.You don\’t have to suffer from the unpleasant odors anymore. Smooth writing and beautiful colors The ink writes smoothly in various kinds of pens and dries quickly on paper.You can also feel the beautiful natural colors of natural materials. Competent makers COLORVERSE is created by a group of makers with years of knowhow.It is treated for hydration and antibacterial propertyso the ink does not dry or deteriorate easily in a pen.It is also designed to maintain the optimal pH 7-8 (neutral)