Here you go:
Blackcurrant (Ribena) wine
One 12oz bottle of Ribena Blackcurrant juice will in fact make one gallon of wine. Dissolve 1.5kilo (3lb) of sugar in some warm water, and add the blackcurrant juice. Bring to the boil and simmer for 10 minutes to drive off any preservative, cool, and pour into a gallon jar, filling it to the shoulder. Then add your chosen wine yeast, or a level teaspoon of Allinson's granulated yeast. The merest trace of acid (one-third of a teaspoon of citirc acid) and a pinch of yeast nutrient should also be added. Insert the air-lock and stand the jar in a warm place for fermentation to get underway. When the first vigourous fermentation has died down after a fortnight or so, top up the jar with warm water to the bottom of the neck, and re-insert air-lock; then continue with the fermentation in the usual way"
From CJJ Berry's excellent book First Steps in Winemaking. |