Grab Dr. Ph. Martin's iridescent color to add a vibrant touch to your calligraphy projects. You can use this shimmering, highly reflective color with your calligraphy pen to create beautiful designs or lettering on dark surfaces. It is also perfect to add a metallic shine to your watercolor art. Details:Available in multiple colors1 fl. oz. (29.57 ml)Archival grade, lightfast and metallicNon-spreading, pigment based and waterproofDropper topNontoxicAP certifiedFor use with brushes, airbrushes, calligraphy and dip pensFor use on paper, wood, board, metal and some plastics