Now the juice must be weighed and, based on its amount, weigh the sugar and vanilla.
I got 350 grams of juice from 600 grams of grapes. For this amount, I took 7 grams of quittin and 350 grams of sugar.
So, return the juice back to the saucepan, add the quittin, pouring it over the surface with “rain”, stirring constantly.
Put the pan on the fire and bring to a boil, stirring constantly.