White wine the death knell of northern viticulture. The vine disappeared from northern Germany and Baden, and the maximum altitude for viticulture descended to 220 metres. Hans-Jürgen Otto noted that: "all the vineyards suffered and decreased in area". In England the vine also disappeared. The less early vineyards preferred to select white varieties of grapes because, even if unripe, white grapes allowed wine that was a little sour to still be consumable, while red grapes do not give enough colour and green tannins make the wine bitter. The interruption of the fermentation by a cold winter led to the discovery of the
Buff (colour) with a black top" in order to indicate their ownership. There is some uncertainty among experts, however, as to the exact shade of what is now called "White Star buff". There is no surviving paint or formula, and although there are many painted postcards and at least seven colour photographs of White Star liners, the shades of the funnels in these varies due to many factors including the conditions under which they were originally made and the ageing of the pigments in which they were printed. Speaking mostly to scale modellers, the Titanic Research and Modeling Association currently recommend a