Since 1934 Dr. Ph. Martin's has specialized in putting the tools in the hands of artists that allow them to create their life's best work. For over 80 years chemists at Dr. Ph. Martin’s have worked tirelessly on creating the best liquid watercolors, inks, and other color products. Dr. Ph. Martin's products are world renowned for their vivid colors, special properties, and ability to work across mediums. The iconic round and square glass bottles come in sets of twelve or fourteen, giving artists an unparalleled dynamic range of brilliant colors to work with. Dr. Ph. Martin's dye and pigment based products let you experience a range of color otherwise unattainable through its products Radiant Concentrated, Spectralite Liquid Acrylics, Hydrus Fine Art Watercolors, Iridescent Calligraphy Colors, and Bombay India Inks. Dr. Ph. Martin's products are manufactured in the United States by Salis International, Inc. in Oceanside, California.