Reddish colour, brewed only about once per year, representing approximately 1% of total beer production. This beer begins with a density of 16.5º Plato is 7.5% ABV. "Rochefort 6" is the oldest Rochefort Trappist beer and was brewed empirically until the end of the Second World War. Until 1958, this was the only Rochefort beer that was bottled in both 33 cc bottles and 75 cc bottles. It has a strong malt taste and is slightly bitter.