Prussian Blue is the first synthetic color of the industrial revolution and can create a large range of tints from one tube with no mixing. A rich blue with a green undertone, it was popular among Japansese woodblock artists for seascapes. It is the same blue used in blueprints. Grumbacher Academy Acrylics is a line of 48 brilliant process colors, metallic and iridescent colors, as well as the most sought after traditional colors. All colors have an ASTM lightfast rating of 1- Excellent. Academy Acrylics are highly pigmented and have superior tinting strength, but at a student price.  Available in 90ml metal tubes and 75ml & 200ml plastic tubes. Made in USA. Since 1905, Grumbacher has been a brand trusted by students, professors, art conservationists, and professional artists throughout the United States.