1. Look for vintage year. If there is none, the champagne is non vintage (NV) and usually a blend of two or more vintages.
2. Blanc de Blancs or Chardonnay on the label indicates that only Chardonnay and no black grapes have been used and the wine may be slightly austere. (Blanc de Noirs means that only black grapes have been used and the wine may be quite full-bodied.)
3. Look at the two-letter code which accompanies the code number of the producer.
4. Sweetness levels: