Carbonation
Transfer method
Fermenting in bottle for the character, then emptying the bottles under counter-pressure into a tank, filtering and refilling to remove the deposit without riddling.
Also called Transversage, Bottle-fermented and transferred.
- Stage
- Carbonation
- Traditional in
- No single tradition — used wherever it suits
- What it most changes
- Fermentation character up
- Safety
- None recorded
What it is
The transfer method takes a cider that has undergone its second fermentation in bottle and, instead of riddling and disgorging each bottle, empties them all under counter-pressure into a receiving tank held at a pressure high enough to keep the gas in solution. The pooled cider is chilled, filtered clear of yeast, adjusted for sweetness if required, and filled back into bottles under counter-pressure. The character comes from the bottle fermentation; the presentation comes from the bulk handling. It is the industrial answer to a method whose bottleneck was never the fermentation but the sediment.
Why it is used
- It captures the ester development and lees character of a bottle fermentation without the labour of riddling and disgorging every bottle individually.
- It makes formats that are awkward or impossible to riddle — half-bottles, magnums and larger — practical, since all of them can be emptied into the same tank.
- Pooling the batch evens out the bottle-to-bottle variation that any set of individual fermentations produces, so the carbonation and the sweetness are uniform across the run.
- The final fill is a normal counter-pressure bottling, so sweetness and sulphite can be set on the whole batch immediately before packaging.
How it works
- Each bottle is opened into a sealed transfer head connected to a tank already pressurised with carbon dioxide at or above the bottle’s own pressure, so the dissolved gas never sees a pressure drop and stays in solution.
- The pooled cider is chilled, which both lowers the equilibrium pressure needed to hold the gas and drops the yeast, and is then passed through a filter under counter-pressure to remove the deposit.
- Any dosage or sweetening is blended into the tank, so every bottle in the batch receives the same addition — a uniformity that disgorging bottle by bottle cannot match.
- Refilling is a counter-pressure operation: the empty bottle is pressurised to tank pressure before the valve opens, filled without turbulence, and closed while still under pressure.
What it changes
The direction this step pushes the finished drink in, dimension by dimension. A direction, not a measurement: how far it moves depends on the juice, the temperature and how the step is carried out.
| Dimension | Direction | Why |
|---|---|---|
| Fermentation character | Raises | The cider genuinely fermented and rested on its lees in bottle, so the autolytic and estery contribution of that period is present, though the subsequent filtration trims it. |
| Body | Either way | Lees contact builds colloidal weight while the filtration that follows removes part of it, so the net effect sits between a disgorged bottle and a tank-conditioned one. |
| Carbonation | Preserves | Every step is held under counter-pressure so the gas generated in bottle survives the transfer rather than breaking out at a pressure drop. |
The chemistry and the organisms
What is actually being changed, and by what. Each entry says what that compound or organism does in cider generally; this page is one place it does it.
Compounds involved
Carbon dioxide
The other product of fermentation, which protects a cider from air while it is being made and, dissolved in the finished drink, changes both its texture and its perceived acidity.
Ethanol
The alcohol yeast makes from fruit sugar, which converts a perishable juice into a keepable drink and carries most of its aroma to the nose.
Dissolved oxygen
Essential to a healthy yeast population at the start of fermentation and the principal enemy of a cider from the moment fermentation ends.
Organisms involved
What it is done with
Counter-pressure filling
Carbon dioxide stays dissolved only under pressure, so carbonated cider poured into an open bottle foams, loses its gas and takes on air; a counter-pressure filler removes the pressure difference by purging and pressurising the bottle first, and vents it under control at the end.
Bottles and pressure: what glass will and will not hold
Sparkling-wine bottles are engineered and tested to hold several atmospheres; still-wine bottles are not engineered to hold any, and filling one with a carbonating cider is the most dangerous ordinary mistake in home cider making.
What can go wrong
Faults that begin at this step, or that this step makes more likely. Each one is set out with its causes and whether it can be put right.
Under-carbonation
A cider intended to sparkle that has little or no dissolved gas, usually because the bottle conditioning never started or the closure did not hold.
Oxidation
The cumulative effect of oxygen on finished cider: fruit aroma flattens, colour deepens towards amber, and a bruised-apple or sherry-like character replaces the fresh one.
Flat and lifeless
A cider with nothing obviously wrong and nothing to say: aroma faded, acidity dulled, finish short — usually the cumulative result of over-processing or slow oxidation.
Unwanted refermentation
Fermentation restarting in a sealed container, generating carbon dioxide that was not planned for and pressure that a bottle may not withstand.
Styles it produces
Categories in which this step is characteristic or required. Some name it in their definition; for others it is simply how they have always been made.
Sparkling cider
Cider carrying enough dissolved carbon dioxide to produce a persistent bubble, by bottle fermentation, tank fermentation or injection.
Sparkling perry
Perry carrying a persistent bubble, a presentation that suits pear’s aromatics and residual sorbitol and has a documented history going back to the seventeenth century.
Medium cider
Cider carrying enough residual or added sugar to be perceptible without dominating, the commonest sweetness level in British retail.
Sidra espumosa
Sparkling Asturian cider made by a second fermentation under pressure or in bottle, presented as a fine sparkling drink rather than in the still poured tradition.
More on transfer method
The transfer method exists because the expensive part of the traditional method is not the fermentation. Sealing a bottle with sugar and yeast costs almost nothing; riddling it, freezing its neck, disgorging it, topping it up and re-closing it is a sequence of individual handling operations that scales linearly with the number of bottles and never gets cheaper. The transfer approach breaks that link by returning the batch to bulk exactly once, at the point where the sediment has to be dealt with. Everything upstream — the tirage, the months in bottle, the yeast working in a small sealed volume — happens as it would in the traditional method, and everything downstream is an ordinary counter-pressure bottling line.
What is gained and what is given up are both worth stating honestly. Gained: uniformity, since a pooled tank has one carbonation level and one dosage rather than a distribution across thousands of separate fermentations; the freedom to use any bottle format; and the ability to make the final sweetness and sulphite decision on the whole batch immediately before filling. Given up: the last portion of the lees character, because the filtration that removes the yeast also removes some of the colloidal material that lees contact contributed, and the cider ends up marginally cleaner and lighter than the same batch disgorged. There is also an oxygen exposure that the traditional method does not have, since bulk handling and filtration offer more opportunities for pick-up than opening one bottle and closing it again.
In cider and perry the method is not common, largely because the producers who commit to a bottle fermentation are often the ones who want the disgorged presentation and are prepared to pay for it, while those who want scale and uniformity go to tank conditioning instead — which achieves much the same outcome without the bottle stage at all. Where transfer earns its place is in awkward formats and in mid-scale operations that already have a bottle-fermented stock and no riddling capacity. Done badly, the characteristic result is a cider that has spent a year in bottle and arrives tasting like a tank-conditioned one: the counter-pressure was inadequate somewhere in the train, the gas broke out, the filtration was too tight, and the reason for fermenting in bottle in the first place has been filtered away.
Related processes
Steps that sit alongside this one, replace it, or depend on it having been done.
Carbonation
Traditional method
A second fermentation in the bottle the cider will be sold in, followed by riddling the deposit into the neck and expelling it, so the drink is both bottle-fermented and clear.
Carbonation
Tank conditioning
Running a second fermentation in a sealed pressure tank so the gas is generated by yeast but the sediment never reaches the bottle.
Carbonation
Bottle conditioning
Carbonating cider by letting a second fermentation finish inside the sealed bottle, so the gas is generated where it is going to stay.
Stabilisation
Sterile filtration
Membrane filtration at a rating that retains viable yeast and bacteria, which is what allows a sweet cider to be shelf-stable without heat or preservative — provided the filling that follows is aseptic.
Packaging
Bottling
Transferring finished cider into glass, where the dominant variable is how much oxygen the liquid picks up in the few seconds it takes to fill and close each bottle.
Packaging
Closure selection
Choosing between cork, crown, screwcap, cage and swing-top, a decision that fixes how much oxygen reaches the cider, whether it can hold pressure, and which faults it is exposed to.
What people ask next
Questions readers ask about the things this page mentions. Each one goes to the section that answers it rather than to a page written to receive the question.
- How is sparkling cider made
- How many calories are in cider — Roughly 40 to 60 kcal per 100 ml for most ciders, so a UK pint falls somewhere around 200 to 250 kcal. Alcohol contributes about 7 kcal per gram and residual sugar about 4, so both strength and sweetness matter.
- Which yeast ferments cider — Saccharomyces cerevisiae finishes almost every cider fermentation, whether it was pitched or arrived from the press house. In a spontaneous ferment it is not the first organism present, only the one that survives the alcohol it makes.
- Which bottles are safe for sparkling cider — A bottle intended for sparkling wine is a different object from a still-wine bottle. It is heavier, thicker, has a deep punt to distribute stress, a reinforced neck and finish designed for a crown cap or a mushroom cork, and it is manufactured and tested against a design pressure.
- What is oxidation in cider
- Where does the fizz in cider come from — Either from fermentation trapped in a sealed container, or from carbon dioxide dissolved into the cider under pressure before filling. The French cider appellations permit only the first, and require at least 1.0 to 1.5 bar at 20 °C depending on the name.
Where to go next
- How cider is made — The whole sequence, stage by stage, with the choices open at each one.
- Cider science — The chemistry and microbiology the methods on this page rest on.
- Troubleshooting — What goes wrong, how to recognise it, and whether it can be reversed.
Sources
What this page rests on. Where a source is marked as registered rather than read, CiderHQ is recording that the body is authoritative on the subject without claiming to have worked through the document itself. See our evidence policy for what each state means.
Cider and perry production technical training material
Peter Mitchell / Cider and Perry Academy · reference work · registered as competent for this subject
Searched again on 2026-08-25 and it remains the one printed source here that a bibliographic check cannot fix, because it is not a published work with an edition. It is course material issued to participants of a training programme, so there is no catalogue record to verify, no ISBN, and no lawful public copy. Its state stays `registered` for that reason rather than through inattention.
The New Cider Maker’s Handbook: A Comprehensive Guide for Craft Producers
Claude Jolicoeur, Chelsea Green Publishing, 2013. ISBN 9781603584739 · reference work · bibliographic record verified, not opened 2026-08-25
Bibliographic record verified on 2026-08-25 against the Open Library union catalogue: Chelsea Green Publishing, 2013, ISBN 9781603584739, one edition recorded. That establishes the citation points at a real book in a stated edition, which is what a citation needs and is all it establishes. No copy was opened and nothing is quoted from it. The book itself is in print and not digitised in any open collection; where CiderHQ needs a figure from this territory it uses an accessible research source instead and says so.