The vendange (vintage) is the annual wine harvest, when the grapes are picked from the vines. It’s usually done around late September or early October, the exact time depending on meteorological vagaries.
The 2021 vintage is probably going to be a shocker because of the awful weather we’ve had this year. However, this image, from a chateau in the Bordeaux region, harks back to a more promising time.
As part of the wine-making process, in Bordeaux as elsewhere, the young wine has to be drawn out of the big stainless steel tanks into smaller containers under the force of gravity. Given how large the tanks are, it’s not surprising that it comes out at high pressure. That’s what you call letting it breathe.
And if you zoom in closely enough, it becomes almost abstract: