Cabernet Sauvignon has had a controversial history in Tuscan wine, particularly for its role in the arrivals of "Super Tuscan" in the mid-1970s. The origin of Super Tuscans is rooted in the restrictive DOC practices of the Chianti zone prior to the 1990s. During this time Chianti could be composed of no more than 70% Sangiovese and had to include at least 10% of one of the local white wine grapes. Many Tuscan wine producers thought they could produce a better quality wine if they were not hindered by the DOC regulations, particularly if they had the freedom to use Cabernet Sauvignon in the blend and not required to use white grape varieties. The marchese Piero Antinori was one of the first to create a "Chianti-style" wine that ignored the DOC regulations, releasing a 1971 Sangiovese-Cabernet Sauvignon blend known as "Tignanello" in 1978. Other producers followed suit and soon the prices for these Super Tuscans were consistently beating the prices of some of the most well known Chianti. Other Tuscan wine regions followed suit, blending Cabernet Sauvignon with Sangiovese and even making varietal versions of the grape. Gradually the DOC system caught on and began allowing more regions to use the grape in their DOC designated wines. Cabernet Sauvignon in Tuscany is characterized by ripe black cherry flavors that can give a perception of sweetness as well as strong notes of blackcurrant. The wines typically reach an alcohol level around 14% but can still maintain notable levels of acidity. When blended with Sangiovese in significant quantities, Cabernet Sauvignon can dominate the blend with most Tuscan producers aiming to find a particular balance that suits their desired style.