What is "plassa"

Plassa (also known as Scarlattino) is a red Italian wine grape variety that is grown in the Piedmont wine region of northwest Italy where it was once historically used as a table grape but now is almost always used for winemaking. Here the grape is most often used as a minor blending component adding tannins to wines made from Barbera, Neretta Cuneese, Grisa nera and Chatus.