This is my first ever instructional video explaining How to cork a wine bottle.
Why do we bottle wine
Putting wine into a bottle with a cork is an excellent way of keeping the wine until you want to drink it. When wine is stored it should only have a very small amount of oxygen available. Uncorking a bottle of wine is a pleasant ritual which many prefer to using a screwtop bottle. The corks seen in the video are number 9 corks and are they are the most common. They should last 10 years with no problem.
When to bottle wine
The simple anwser is when no more gasses will be created which could cause the bottle to explode. Wine made from Grapes is picked in the Autumn. The initial very vigourous primary fermentation when most of the sugar is converted into alcohol, lasts about 10 days. The fertmentation then slows down and then many people say that the wine should be kept in a cool place for the first winter. The cold temperature seems to help the wine clear. The wine is just about drinkable by March of the following year and by May it should taste good. However, wine is not generally bottled until at least one year after it was first picked because sometimes more subtle types of fermentation can occur such as maleoactic fermentation. This could create carbon dioxide which may cause the bottle to explode. Other types of wine such as champagne and fizzy wine can be bottled when fermentation is still active but they need high pressure bottles and a special cork. It is possible to stop a wine fermenting when it is still sweet by adding Potassium Sorbate which stop the yeast reproducing. However we never put chemicals of any kind into our wine.
The video below explains how we put cork into the bottles. For a very small producer like ourselves, a small floor mounted hand corker is enough for our needs. In reality we store a lot of our wine in recycled 5 litre plastic containers. However, a bottle of wine with a cork and a label is a pleasant object so we always bottle some to give away as gifts and to add a sense of occasion when sitting around the table etc. By the way the sphincter like crusher in the centre is called an iris. It dilates and reatracts a bit like the iris in an eye.