Valpolicella Ripasso is a form of Valpolicella Superiore made with partially dried grape skins that have been left over from fermentation of Amarone or recioto. Winemaking in the region has existed since at least the time of the ancient Greeks.
Barium chloride, or any other barium salt, should burn with a green flame. When a barium salt is burned, the thermal energy is transferred to the outer electrons of the barium ions. They gain enough energy to excite them to a higher energy level. They then drop back to their ground state, releasing energy.
Sodium chloride at left gave the brightest light, much brighter than the blue flame of the burner. The color is visually the same as other sodium lights, coming mainly from the sodium d-lines. The brilliant red of strontium is the most dramatic of the flame colors. At right above is a sample of barium sulfate (barite) mineral, which gave only a small amount of light which was almost white. All of the above flames were obtained from a natural potassium chloride (sylvite) sample.