Coffee is a freak product. Especially it concerns its storing, which working time depends on the package. How coffee should be packed for better shelf life?
The main purpose of coffee package – do not let oxygen to the beans. Entering into chemical reaction with oxygen, fats, which are contained in coffee beans, are oxidized. That distinctly worsens the taste of the product. That is why the package quality of roasted coffee has a profound effect on the shelf life of this product.
In paper bags coffee keeps its quality about two weeks, in foil bags – till three months, and in tight packs coffee can be stored up to six months. Longest, coffee is stored in ordinary glass jar.
As a rule, packages are consists of some layers. It can be a number of used materials. For example, the first layer is polyamide or nylon, the middle one – aluminium, and inner layer – popular polyethylene.
There are 2 types of modern coffee packing – vacuum and gas-filled, which help to increase the product shelf life up to one year and even more. Both these versions are quite expensive and required the presence of special processing line.
Only ground coffee is packed into the vacuum bags. It is made after air-cooling. In this case the carbon dioxide will be released from coffee. Then in special vacuum chambers they pump out oxygen from packings. Such strong blocks contain 250 or 500g of ground coffee. If package is damaged, it becomes soft very quickly because of the oxygen intake.
Another kind of packing – is gas-filled with ventilation damper. It is used for grain coffee. From the whole coffee bean in its cooling-down process after roasting, gas is escaped slower, then from the ground coffee. The valve acts only in one way – it lets the gas out, but prevents oxygen penetration into the package. The gas-filled packages contain usually 250, 500 or 1000g of coffee.
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Tags: coffee bean, coffee package, ground coffee, roasted coffee
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