Red and Rosé winemaking Flashcards
The key to red winemaking is optimise the extraction os colour and tannins from the skin of a black grape. there are considerably more options to consider before, during and after fermentation, than in the case of white winemaking.
halah to that
the vast majority of fruit used in red winemaking is destemmed and crushed, which steps and techniques are possible to control the wine before its endresult?
1) pre fermentation extraction
2) temp control during fermentation
3) cap management techniques:
- punching down
- pumping over
- rack and return
- rotary fermenters
- kind of fermentation vessels
4) post fermentation extraction
5) press wine
Why pre fermentation extraction ?
the grapes macerate for a period on a low temp, extract colour and flavour. tannins are more soluable in alcoholic fermentation, so not yet in this point.
why would the winemaker control the temp during the alcoholic fermentation?
between 20-32°c (depending on the style being made) —-above 35°c it will kill the yeast
—-precise control of temp can allow the winemaker control the amount of extraction of colour, flavour and tannin eg: lower the temp towards the end of ferm, to slow the tann extraction
cap management techniques: a fermenting red wine will have a thick mass of pulp and skins on it surface. this mass is known as the cap. if the cap is left to float, little colour, flavour or tannin will be extracted from it. this can be controlled by different ways:
1) punching down: traditionally this meant punching the cap down by hand with paddles on the end of sticks.
—- this posed certain dangers for the winery workes as there was always the possibility of someone being intoxicated by carbon dioxide. stay easy on punching down, dont overwork the cap
2) pumping over: drawing off fermenting juice from the bottem of the vat and pumping it on the top, wetting the cap.
–dissipating the heath (warmte kwijtgeraken)
—- oxygenating the juice
3) rack and return: this fermenting is drained from the fermenting vessel into another vessel, leaving the cap behin. the juice is then pumped back over the cap.
—-this is normaly only used once or twice during the fermentation as it can be very extractive.
—-like pumping over it is a very good way of dissipating heath (warmte kwijtgeraken)
4) rotary fermenters: fermentation takes place in rotating horizontal tanks, this keeps the juice in constant contact with the skins
5) kind of vessels: most are open to control the cap.
these vessels can be made of:
- oak
- concrete (beton)
- stainless steel
Why post fermentation extraction ?
maceration after fermentation encourages the further extraction of tannin, which may or may not to be desirable (verlangend).
—– some winemakers have found that very long periods of post fermentation maceration can help to create a smoother tannin structure
What about press wine?
when the maceration is finished:
1) The free run wine is drawn of the skins
2) the remaining mass is pressed, creating press wine
3) at the beginning of the pressing, the press wine can have a similar ( gelijkaardig) in composition (tegenovergestelde) to the free run wine, but when the pressing continous, the wine becomes deeper in colour and higher in tannin.
4) some winemaker will sepparate the wine from different stages in the pressing (calles press fractions). later press fractions may then be used to adjust colour and tannin in the final blend.
what about whole bunch fermentation ?
As has been noted, the vast majority of red wines are made solely with chrushed fruit. however some winemakers include whole bunches of uncrushed grapes:
- sometimes they fill the entire with uncrushed fruit
- sometimes just a small percentage may be used to make a more subtle contribution to the flavour of the wine
IMPORTANTLY: if whole bunches are used, the grapestems needs to be fully ripened otherwise there is an bitter taste.
The objective of this technique is to create an oxygen free environment for the uncrushed fruit.
this lack of oxygen has a number of outcomes:
1) the grapes create some alcohol in their cells, without the involvement of any yeast. this is referred to intracellular fermentation.
2) a range of distinctive (kenmerkende) fruit aromas is created inside the berry
there are 3 forms of whole bunch fermentation: a) carbonic maceration describe
1) carbonic maceration:
a) placing only whole uncrushed bunches into vats that are then filled with co2 to remove all the oxygen. this causes the intracellular fermentation to 2% of alcohol
b) once the 2% of alc is reached the grape skins start to split and releases their juice.
c) the grapes are enerally pressed at this stage to separate the juice from the skins
d) the yeast then complete the fermentation off the skins
- — importantly: this method extract colour from the grapes, but little tannin
- — the resulting wines are soft and full of fruit, with distinctive notes of kirsch, banana, bubble gum an cinnamon- like spice.
there are 3 forms of whole bunch fermentation: b) semi carbonic maceration describe:
this is a similar but slightly different technique that does not involve filling the vats with co2:
a) the vat is filled with whole bunches and the grapes at the bottom of the vats are crushed due the weight of the grapes.
b) the juice start to ferment at the bottom and produce co2
c) this is the reason why the other grapes starts their intracellular fermentation (carbonic maceration)
d) as the intact grapes begin to split and release their juice, the grapes are pressed and the yeast complete the fermentation off (zonder) the skins
How will they practice semi maceration carbonique to premium pinot noir?
they use the same system as the semi carbonique.
- although the alcoholic fermentation continous on the skins
- by this method the grapes will be progressively broken up by punching down in the first days
- an ever decreasing amount (toenemende mate) of maceration carbonic takes place until all the grapes are broken
- this approach can result in a better integration of the aromas from intracellular ferm with the aromas from the grape variety
- ——results in a wine with a fresher fruit character
there are 3 forms of whole bunch fermentation: c) whole bunshes with crushed fruit
a further variation is to mix whole bunches with crushed grapes in the fermenting vessel at the start of the fermentation:
- not the whole vat is free of oxygen but the whole bunches are surrounded by crushed grapes, so the intracellular ferm starts
- the whole bunches are progressively crushed by punching down
- this gives an silkier texture and a brighter, fresher fruit character
virtually all red wines undergo MLF because the wines have a robust flavour and texture, so they don’t spend a lot of time on their lees.
ge kunt het zehmel
high quality and concentrated fruit can have no oak ageing.
nope: the good quality and high concentrated fruit can support a greater level of new oak flavours
Gradual sedimentations naturally occurs on wines that are subjected to a long maturation. before bottling
yeppaa
what are the grape growing conditions and what kind of grapes do they use for making high volume inexpensive red wines ?
1) areas: warm, sunny and dry
2) grape varieties:
- cab sauvignon
- merlot
- syrah
- grenache
3) not only suited for warm regions, but due the concentration of colour (skin) theyre able to produce wines with enough tannins and colour, even at high yields.
- - compared with premium wines, these high volume wines from each separately variety will have less colourr, tannins and flavour intensity.
4) sometimes the single character of each variety can be diminshed (verdwijnen) and the wines can be homogeneous (lijken op elkaar)
5) single variety: eg on bottle: merlot
blend: on bottle: fruity red or,…