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Visual examination of a wine is an integral part of wine-tasting.
Before the wine is smelt or tasted, its « robe » (visual
aspect), can provide a wealth of information : clarity, viscosity,
age… and often geographical origin.
Here’s what to look for…
Shine
When seen from above, the surface of the wine, known as the disc should
be shiny
and completely clear. A dull or matt disc, the presence of a greyish
layer or dust
are considered to be defects.
Clarity
At eye level, with the glass tilted slightly, the wine must be totally
clear. If it is cloudy, milky, foggy, opaque, flaky or full of sediment,
then it has had problems during vinification or storage.
Viscosity
With the glass still at a tilt, a slight rotating movement will enable
you to examine how the wine « wets » the glass. If it
leaves traces in the form of droplets or « legs » then
it has
a high glycerol, residual sugar or alcohol content. The wine is then
said to have « legs », or that it is fatty, which is generally
a sign of quality. However, this viscosity depends
on the type of wine and a very fluid wine can also be of excellent
quality.
The tint of the « robe »
Again looking downwards and tilting the glass over a white surface
or a light source enables one to appreciate a broad range of colours,
from the centre of the disk to its edges.
- Violet, purple tints are typical of younger red wines. From one
or two years onwards
a large variety of reds can be seen : vermilion, cherry, ruby…
Later on, orange nuances (clay, brick) take over, indicating the wine’s
evolution. Finally great wines can develop ochre or brown tints.
- For white wines the range can go from the very pale yellow of young
dry white like muscadet or sauvignon, to the amber or caramel colour
of older wines with a low acid level… but also sometimes oxidised.
Between these two extremes, all of the nuances
of yellow exist, with green tints for wines from Alsace, straw or
gold for mature Burgundies.
- The colour of rosé wines depends on their vinfication and
the length of time the skin
as in contact with the juice. However, age also creates certain visual
nuances : a yellowy or orangey pink, onion peel or salmon colour.
The intensity of the colour
A young wine has a frank, raw fresh colour. An ageing wine or fully
aged wine,
on the contrary, will have a used « robe ».
In addition to this degree of change, the colour of a red wine gives
indications as to its concentration and sometimes enables one to determine
its origin, even the year. Indeed, all varietals do not possess the
same colouring power.
Examples of wine colours from darkest to lightest are Syrah, Grenache
(Rhône valley), Cabernet-Sauvignon and Merlot (Bordeaux), Pinot
Noir (Burgundy) and Gamay (Beaujolais).
As for the year, years of correct ageing lead to more intense reds
than years with
no particular cachet. However, this must be taken as a simple indication,
the hand
of the winemaker can, in some cases, fool the most inspired specialists.
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