Sap Green ia a transparent, lightfast Olive Green with a yellow/orange under-tone. The original Sap Green was derived from the juice of Buckthorn Berries and was fugitive. Grumbacher Sap Green is an exact duplicate of the masstone and undertones of the original, but is completely lightfast. It is a must for the landscape and seascape palette. 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.