Red and Rosé winemaking Flashcards
Why is red winemaking more invovled in winemaking than white ?
Because the grapes must be fermented on their skin to extract colour and tannin
What are the consequences of adding skin in the fermentation in the winemaking process of red ?
- lot more of options to consider during and after fermentation than white win
- Pressing happens after fermentation, not before
- Malolactic conversion nis standard practice rather than a stylistic choice
What are the step of crushed fruit fermentation in red winemaking ?
- Pre-fermentation extraction
- Temperature Control During Fermentation
- Cap Managment
- Fermentation vessels
- Post-fermentation extration
- Press wine
What is the pre-fermentation in red winemaking
Once the fruit is crushed some sinemkaer leave the grape to macerate at low temperature to allow the fermentation to start
referred to as Cold maceration or cold soaking.
To extract colour and flavour compounds
Tannins are more soluble in alcoholic solutions , and therfore no readily extracted at this point.
What is the temperature control during fermentation in red winemaking ?
Range between** 20° and 32°** depending on the style
Higher then white to extract colour, flavour and tannin
Must not exceed 35° or yeast may die.
Precise control allow the winemaker to influence extration.
How can a winemaker reduce the extraction of tannins with fermentation temperature ?
As tannins are more soluble as alcohol level rise, the winemaker can redu their extraction by lowering the temperature towards the end of the fermentation.
What are the cap management techniques in red winemaking ?
Punching down
Pumping over
Rack and returne
Rotary fermenters
Explain the general concept of cap management in red winemaking
A thick mass of pulp and skins at the surface of fermentation wine is called Cap
If the cap is floating, little colour, flavour and tannin will be extracted
All the cap management techniques may be combined or used at different stages of fermentation
How can the level of extraction be influenced by cap management in red winemaking?
By altering the duration of each cap management technique and the number of times this is practised each day
Explain the punching down method in red winemaking
Cap management technique
Mechanical paddles are punching the cap down in teh vat
Very practised and effective
Important to no overwork the cap by punching down too vigorously, particularly at the end of the fermentation wince tannins are more easily extracted
Explain the Pumping over method in red winemaking
Drawing off fermentation juice from the bottom of the vat and pumping it up on the top, wetting the cap
Popular technique and good way to** dissipate heat** and oxygenate the juice
Explain the Rack and return method in red winemaking
Cap management technique
Fermenting juice is drained from the fermenting vessel into another vessel leaving the cap behind. The juice is pumped back over the cap.
Normally only used once or twice during a fermentation, as it is very extractive.
Good way to dissipating heat.
Explain the rotary fermenters method in red winemaking
Cap management method
Fermentation takes place in rotating horizontal tanks which keep the juice in constat contact with the skins
What are the Fermentation vessel options in red winemaking ?
Often in large vessels to be able to use cap management techniques
Often open-topped
Can be made of** oak, concrete, stainless steel.**
Fermentation in oak barrel is impractical for red as it would be almost impossible to maintain sufficient contact between skins and juice.
Explain the concept of Post-fermentation extraction in red winemaking
Macereation after fermentation encourages for further extraction of tannin
The use and lenght depends on the style being made
Some thing that very long period can help to create a smoother tannin structure
Explain the concept of Press Wine in red winemaking
When maceration has finished free run juice is drawn off the sking and remaining mass is pressed, creating **press wine*
At the beginning of pressing, it may be similar to the free run wine, but as pressing continues, it becomes deeper in colour and higher in tannin.
Some separate the wine from the different stages in the pressing, called fractions
What are fractions used for in red winemaking?
Used to adjust colour and tannin in the final blend
Explain the general concept of Whole bunch fermentations in red winemaking
Objective is to create and oxygen-free environment for the uncrushed fruit. Outcomes:
- Berries create some alcohol in the cells without yeast called intracellular fermentation
- range of distinctive fruit aromas is created inside the berry to give unique qualities to the wine.
Whole bunch can make up the entire vat or a small percentage
The stems but be fully ripe, toi avoid bitter tatste
What are the 3 whole bunch fermentation methods in red winemaking ?
Carbonic maceration
Semi-carbonic maceration
Whole bunches with crushed fruit
Explain Carbonic maceration in red winemaking
- placing whole uncrushed bunches into vats filled with CO2 to remove all oxygen
- Intracellular fermentation start
- Once the level of alcohol in the grap reaches 2%, the grape skins split and juice is relase
- Grapes are generally pressed at this stage to separate juice frome skins
- Yeast then complete the fermentation.
Extract colour but little tanin.
Notes of kirsch, banana, bubble gum, cinnamon like spice
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What are the particular aromas from carbonic maceration ?
full of fruit
kirsch
banana
bubble gum
cinnamon-like spice
Explain semi-carbonic maceration in red winemaking
- Vats are filled with whole bunches
- Grapes at the bottom are crushed under the weigh and some juice is released
- Ambient yeast ferment the juice, which produce CO2
- Co2 fills the vat and intact berries undergo carbonic maceration
- As the intact grapes begin to split and release juice, grapes are pressed and yeast complete the fermentation.
Explain semi-carbonic fermentation, when it continues on the skin.
Some premium Pinot noir use this technique
- Same technique but the fermentation continues on the skin
- The grapes will be broken up using punchig down over the rist few days
- A decreasing amount of carbonic maceration takes place until all the grapes are borken up.
- Alcohol fermentaiton continue and may be followed by a post- fermentation maceration.
What is the advantage of continuing the semi-carbonic maceration on the skins ?
Result in a better integration of the aromas from intracellular fermentation with aromas from the grape varietiy.
Wines with a fresher fruit character.
Explain the Whole bunches with cruhed fruit fermentation technique in red winemaking
- Mix whole bunches with crushed grapes in the vessels
- Fermentation start
- whole bunches are largely submerged by the crushed grapes and kept away from oxygen, and intracellular fermentation takes place
- whole bunches are cruched during the fermentation as the cap is regularly punched down
- more carbonic characteristics can be achieved by raising percentage of whole bunches at the start of the fermentation
Thought to give the wine a silkier texture and brigher, fresher fruit character
How is the wine benefiting from Whol bunches with crushed fruit fermentation ?
Thought to give the wine a silkier texture and brigher, fresher fruit character