Princeton has done it again. Almost 2 years ago, princeton gave artists a synthetic version of sable that was almost the equal of fine kolinsky and is still the standard for performance for its rivals. When they set out to create a synthetic version of squirrel they developed a brush that may actually outperform the natural version. Neptune™ is their thirstiest brush ever delivering oceans of color to the sheet. Experts in natural hair have been incredulous that this is actually synthetic. We are proud to offer neptune™ in a beautiful range of shapes including mottlers and quills. The beautiful sea glass handles of the aquarelle brushes are the signature of the line.