Sparkling Wine Making: Rüttelpult
Here you see what we call "Rüttelpult" (jiggling board) in sparkling wine making. It's basically a board with holes where, in the process of the fermentationn in the bottles, the bottles full with the "raw wine" get stuck in upside down, so that the yeast starts to settle in the top parts of the bottles. Due to the yeast the wine starts developing the sparkling.
The jiggling part of it is, that the bottles get twisted a bit from time to time so that the yeast gets fully collected in the bottleneck. If you look close you can see a white line on the bottom of each bottle (it's a bit tricky since you also see the reflection of the light). The direction of the white line tells the wine maker which bottles have been twisted and when.
By the way, this is also the same process as for Champagne. The only difference is that only sparkling wine from the region Champagne in France is allowed to carry that name.
Tomorrow, I'll show you how the yeast comes out of the bottles without losing the sparkling...