Guide For Coffee Bean Preservation

Guide For Coffee Bean Preservation

After choosing the coffee beans, the next lesson is to store the coffee beans. Do you know that coffee beans are freshest in a few hours after baking? Which container can best preserve the freshness of coffee beans? Can I put coffee beans in the fridge? Next, we will tell you the secret of storing coffee beans.

Coffee Bean Preservation: Fresh Coffee Beans

As with most foods, the fresher they are, the more authentic they are. The same is true of coffee beans. The fresher they are, the better they taste. Getting good quality coffee beans is not easy. You don't want to drink coffee that tastes bad because it has not been stored properly. Coffee beans are very sensitive to the environment and do not have a long tasting period. For those who are looking for high-quality coffee, the correct storage of coffee beans is a critical topic.

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First, let's take a look at the characteristics of coffee beans. After the freshly baked coffee bean oil is baked, the surface will have a shiny luster (except for lightly baked coffee beans and special beans treated with water washed decaffeinated). Some reactions will continue inside the beans and release carbon dioxide. Fresh coffee beans can emit 5-12 liters of carbon dioxide per kilogram. This exhaust phenomenon is one of the keys to distinguishing whether coffee is fresh or not.

Through this continuous change process, coffee will begin to get better within 48 hours after baking. It is suggested that the best taste period of coffee is 48 hours after baking, preferably no more than two weeks.

Elements Affecting The Freshness Of Coffee Beans

Buying freshly roasted coffee beans every three days is obviously a little impractical for busy modern people. If you save coffee beans in the right way, you can avoid the trouble of purchasing and still drink coffee with intact original flavor.

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Roasted coffee beans are most afraid of the following elements: oxygen (air), moisture, light, heat, and a peculiar smell. Oxygen makes the coffee bean curd bad and deteriorate. The water will wash away the oil emitting aroma on the coffee surface, and other elements will interfere with the internal reaction of the coffee bean and finally affect the flavor of the coffee.

From this, you can infer that the best environment for storing coffee beans is a dry, dark and tasteless place isolated from oxygen (air). Among them, it is most difficult to isolate oxygen.

Vacuum Packaging Does Not Represent Freshness

You may think, "it's easy to isolate the air. Just use vacuum packaging. Or, put it in a sealed coffee can." Vacuum packaging or fully sealed packaging may be good for other ingredients, but we must tell you that neither of these packagings is suitable for fresh coffee beans.

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As we said before, coffee beans constantly release large amounts of carbon dioxide after roasting. If the coffee beans in the vacuum pack are fresh, the bag should burst. Therefore, the general practice of manufacturers is to let the roasted coffee beans sit for a period of time until the beans have stopped venting before putting them into the vacuum pack. You don't have to worry about bursting, but the coffee beans no longer have the freshest flavour. It is possible to vacuum pack coffee powder, but we all know that the powder itself is not in the freshest state of the coffee.

Sealed packaging is not a good method. Closing the package only prevents air from entering. The atmosphere in the original packaging cannot get out. There is 21% oxygen in the air, which is equivalent to enclosing the oxygen with the coffee beans and does not allow for the best preservative effect.

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The Best Device For Preserving Coffee: One-Way Ventilation Valve

Here comes the correct solution. At present, the device on the market that can achieve the best effect of preserving the freshness of coffee beans is the one-way ventilation valve, which was invented by the fresco company in Pennsylvania in 1980.

Why? Here we review the simple physics of senior high school. Light gas moves faster. Therefore, in a space with only one outlet and no gas, light gas tends to escape, and heavy gas tends to stay. That's what Graham's law told us.

Imagine a bag packed with fresh coffee beans. There is some spare space filled with air, and there is 21% oxygen and 78% nitrogen in the air. Carbon dioxide is heavier than both gases. When coffee beans produce carbon dioxide, they squeeze out oxygen and nitrogen. At this time, if there is a one-way ventilation valve, the gas can only go out and can not come in, and the oxygen in the bag will be less and less over time, which is exactly what we want.

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The Less Oxygen, The Better Coffee

Oxygen is the killer of coffee bean deterioration, which is one of the principles that must be considered when selecting and evaluating various coffee bean storage products. Some people choose to poke a small hole in the bag of coffee beans, which is better than completely sealing it, but the amount and speed of oxygen escape are limited and the hole is a two-way pipe, and the outside oxygen will also run into the bag. Reducing the air content in the package is also an option, but only the one-way vent valve can reduce the oxygen content in the coffee bean bag.

In addition, it should be reminded that the packaging with a one-way ventilation valve must be sealed to play its role. Otherwise, oxygen can still enter the bag. Before sealing, you can gently squeeze out the air as much as possible to reduce the gas space in the bag, and there will be less oxygen in contact with coffee beans.

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How To Preserve Coffee Beans

Of course, the one-way ventilation valve is only the beginning of preserving coffee beans. Below we have sorted out some questions you may have, hoping to help you enjoy the freshest coffee every day.

The best tasting period for coffee beans is generally recommended to be two weeks, but if purchased after that, the best thing to do is to put them in the fridge. We recommend using sealable freezer bags (the less air in them, the better) and storing them in small packages. Each package should not last more than two weeks. Please remove the coffee beans one hour before use and wait for them to de-ice to room temperature before opening them. There is less water condensation on the surface of the coffee beans. Don't forget that moisture can also seriously affect the flavour of the coffee beans. Never put back coffee beans that have been removed from the fridge, as moisture may affect the taste of the coffee during the thawing and freezing process.

Under the condition of good storage, coffee beans can be kept fresh in the freezer for two weeks. It can last up to two months, but it is not recommended.

Coffee beans can't be put in the freezer. Only the freezer can keep them fresh. The first is that the temperature is not low enough. The second is that the coffee bean itself has the effect of removing a peculiar smell. It will also suck the taste of other foods in the refrigerator into the beans. Finally, the coffee may have the taste of your refrigerator. No storage box can resist the smell, and even coffee powder is not recommended to be placed in the refrigerator.

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The best way to preserve coffee powder is to boil it into coffee and drink it because the standard storage time of coffee powder is one hour. Freshly ground and brewed coffee can retain the best flavor.

If there is really no way, we suggest putting the coffee powder in a sealed container (porcelain is the best). Coffee powder is very susceptible to moisture. You must keep it dry and try not to keep it for more than two weeks.

Buy fresh beans of good quality, sealed and packaged in dark containers with one-way ventilation valves, and put them in a dry, cool place without sun and steam. The flavor of coffee beans gets better and better 48 hours after baking, and it is the freshest when stored at room temperature for two weeks.

It's simple because good quality coffee is worth your trouble. Coffee is a very daily drink, but it also has a wealth of knowledge to study. Finally, let's taste the best and purest flavours of coffee together.

What kind of coffee do you like? Do you know the difference between cappuccino, mocha, and latte?