What the calculator computes
An animated red wine tank: the cap, pump-over with a sprayer or punch-down with a plunger, the wine darkening in colour, and gauges. The charts show anthocyanins rising and falling, skin and seed tannins growing and alcohol rising.
Choose the variety, the method and frequency of mixing, cold soak, enzyme and temperature setpoint; the pressing day can be dragged on the chart. Result: anthocyanins, tannins, colour intensity, tannin to anthocyanin ratio, a comparison of pressing days and warnings about a dry cap, overheating or bitter tannins. The model is indicative.