How to keep coffee fresh

Ultra-practical coffee preservation methods to keep your coffee beans fresh all the time
1. Use an airtight container Using an airtight container is one way to preserve the freshness of your coffee. Putting the coffee beans in an airtight container, making sure it is completely closed, can prevent air from entering, thereby reducing the rate of oxidation of the coffee beans. You can choose a long-term storage airtight bag or bottle and put the coffee beans in it.

2. Low temperature storage Storing coffee beans at lower temperatures can slow down their oxidation rate. Storing coffee beans in the refrigerator is best, but if you don't have a refrigerator, you can store them in

1. How long is the shelf life of coffee?
The shelf life of coffee varies from coffee to coffee, such as freshly ground coffee, instant coffee, green coffee beans, and roasted coffee beans are not nearly the same.

Freshly ground coffee: After the roasted coffee beans are ground into powder, the drinking period is within two weeks after roasting. This kind of coffee has a fresh aroma during processing, and the freshly ground coffee brewed has a better taste.
Instant coffee: If it is not opened, the general shelf life is about two years; once it is opened, the shelf life will be shorter.
Coffee beans: The shelf life of coffee beans is generally one to two years, and temperature factors and humidity affect the shelf life.
Roasted coffee: The moisture content of coffee beans is close to zero, so as long as it is sealed well, the storage time can even last for decades, but this kind of operation requires high requirements, so it is commonly used in ordinary families.

2. How to identify the freshness of coffee beans?
1. Coffee color: If the color is uneven, it means that the roasting is uneven, or there are many defective beans that are not easy to roast, such as dead beans and unripe beans.
2. Odor: After the cooked coffee beans are broken, take a sniff with your nose, and you should smell a fresh aroma. If the smell is weak or stale, it means it is not fresh enough and the quality is not good.
3. Roasting degree: The coffee beans are dark brown and have a glossy surface, but they are dry and non-greasy to the touch, indicating that the degree of roasting of the coffee is just right. It is an ideal degree of roasting for coffee shops or coffee pots.

In other words, if the surface of the coffee beans is greasy, if you touch it with your hands, the hands will be covered with oil stains, which may indicate the following two situations: First, the roasting degree of the coffee beans is too deep, the burnt bitterness is heavy, and the coffee beans have already produced oil. The second is that the freshness of the coffee beans is insufficient - any freshly roasted coffee beans will produce oil if they are stored for a long time.

4. Grinding: Observe the cross-section of the broken roast coffee beans. If the color is uniform, it means it is well baked. If the color of the cross-section is uneven, it means that there are flaws in the baking process, and the quality is naturally doubtful.
When the high-quality coffee beans are ground, they will make a soft salad sound, and if you shake them gently with your hands, the original flavor of the coffee will overflow. Inferior coffee beans will have a creaking sound and a feeling of being stuck when grinding.

5. When extracting: The easiest way to brew delicious coffee is to filter the extraction through a filter paper. When brewing and extracting, there is also a way to judge whether the coffee is delicious, that is, when hot water is added, whether the powder swells up, and when the coffee is fully roasted and the water is extracted, there will be a beautiful and delicate foam that swells up.

Good coffee beans: neat in shape, bright in color, single-roasted, mellow after brewing, and full of stamina.

Bad coffee beans: The switch is different, and the individual is incomplete, and it has a light fragrance after brewing, and it is not sweet enough.

Factors affecting the shelf life of coffee beans:
1. Roasting date and production date: The freshness of roasted coffee beans directly determines its taste quality and shelf life. Generally, the flavor is best within 2-3 weeks after baking, and the flavor will gradually decline thereafter. So, the fresher the roast date, the longer the shelf life of the coffee beans. Freshly roasted coffee beans have a shelf life of 4-6 months.

2. Storage environment: The storage environment of coffee beans has a direct impact on its shelf life. Temperature, humidity, light and oxygen are all key influencing factors. For every 1 °C increase in temperature, the freshness of coffee beans decreases by about 2 times. Too high humidity can cause mildew, too low can dry and acidify the beans. Light and oxygen also accelerate the oxidation and flavor loss of coffee beans. Under low temperature (18-22°C), cool, sealed and anaerobic conditions, freshly roasted coffee beans can be stored for 4-6 months. However, under normal temperature and open conditions, it can only be stored for about 3 months. Storage conditions are an important factor in determining the shelf life of coffee beans.

3. Packaging materials: sealing and oxygen resistance of packaging materials

5. How to store coffee: How to store coffee:
1. Preservation in the original packaging bag Most of the coffee beans now use a one-way degassing valve bag lined with food-contact grade aluminum foil. Aluminum foil blocks light and air. The function of the one-way degassing valve is to discharge excess carbon dioxide so that the bag will not burst if it is not opened. Immediately after removing the coffee beans, seal the bag and squeeze as much air as possible.
2. Storage in airtight cans It is also a good way to store coffee beans in airtight cans, but it should be noted that the quality of the airtight cans must be good. If the quality is too poor, it is better to use the original packaging.

“Using airtight cans to store coffee beans is also a good way, but it should be noted that the quality of the airtight cans must be good. If the quality is too poor, it is better to use the original packaging bag. Another point, do not buy transparent cans for the so-called beauty. Light can increase the speed of coffee oxidation. It is recommended not to buy transparent ones.

3 Vacuum tank storage: Vacuum tanks can evacuate the air in the tank to form a vacuum state. There is no oxygen and water vapor in the vacuum state. It is a good way to store coffee beans, but it should be noted that this method can only delay the shelf life of coffee beans, and cannot guarantee that coffee beans will be fresh for a long time.

4 Storage in the refrigerator: The low temperature in the refrigerator can slow down the oxidation reaction of coffee, and it is a good storage place. However, there are many conditions in the environment in the refrigerator. Only by trying to eliminate them can the coffee beans be effectively preserved, otherwise it will be counterproductive. It is not necessary and troublesome to store coffee beans in the refrigerator. If you must use the refrigerator to store, please note the following points:

1. Cannot be placed in the fresh-keeping layer, but in the frozen layer. Although the fresh-keeping layer is also low temperature, the humidity is too high, which is not conducive to the preservation of beans. The freezing area has lower temperature and very low humidity. Humidity has a greater impact on coffee quality than temperature

2. The seal is better. If the seal is not good, the moisture in the refrigerator will enter the inside of the package and affect the preservation of coffee beans. Another point, we know that coffee beans are easy to absorb flavors. If the seal is not good, all kinds of smells in the refrigerator will be absorbed by coffee beans, then these coffee beans can also be said to be waste. Therefore, some people use waste coffee beans to absorb the miscellaneous smell in the refrigerator, and the effect is quite good.

3. When the coffee beans are just taken out of the refrigerator, because the temperature of the beans is too low, the water vapor in the air will condense, forming small water droplets on the surface. After grinding, these water droplets will clump the coffee powder, resulting in uneven brewing.

4. After the coffee is roasted, its internal development is still in progress. If you put the freshly baked beans in the refrigerator, it will stop the development of flavor. Therefore, it is recommended that you store freshly baked coffee in a suitable environment, and store it in the refrigerator after 2 to 3 days of flavor development.

With the increase of time and processing procedures, the life of coffee will be reduced; proper storage methods can prolong the freshness of coffee.

Good places to store coffee:
Coffee should be stored in a dry, cool place, never in the refrigerator, where it can absorb moisture. Coffee beans and ground coffee can be frozen, the only thing to pay attention to is that when taking the coffee out of the freezer, you need to avoid the frozen part from melting and making the coffee in the bag wet. Americans think that coffee is better in the refrigerator. But it won't take more than a month. They take out the coffee beans they want to drink from the freezer, grind them before they are defrosted, and brew them for drinking.

Packaging that aids in coffee storage:
The tin can keeps the coffee aroma longer. Plastic bags work too, but they hold less than tin cans. In foreign countries, coffee beans are sometimes sold in tin cans or plastic bags. Vacuum packaging is more conducive to the storage of coffee and makes the original flavor last longer.

As soon as you open a greaseproof or foil-wrapped coffee bag, place the beans or grounds in an airtight jar; the grounds won't go moldy as quickly, but like the beans, they will absorb flavors from the air.

Storage of coffee beans:
The darker the beans that have not been roasted or roasted, the better. Once the coffee beans are roasted, they will slowly lose their aroma, and the aroma will disappear after two weeks. So buy a small amount at a time, or buy a small amount of pre-ground coffee. If you order coffee from a coffee bean specialty store by mail, it is best to buy unground beans.

Storage of instant coffee:
The instant coffee bag is a product developed from roasted and ground coffee in recent processed foods. Its thin aluminum material helps preserve the original aroma of coffee to the greatest extent.

vacuum pack storage
The air in the refrigerator is cold and dry, and it is easy to evaporate the moisture in the coffee beans, causing the aroma to be lost, and there are too many miscellaneous smells in the refrigerator, so the coffee beans should be stored in a vacuum tank. Prevent coffee beans from contacting other miscellaneous smells in the refrigerator, which will affect their own taste.

Tips on how to store leftover coffee:
1. Store in containers Putting leftover coffee in containers is a common storage method. Choose a container that is airtight and make sure it is completely dry. Even better if you have a vacuum reservoir as it can help keep your coffee fresh.

2. Store in the refrigerator If you have some leftover cold coffee, store it in the refrigerator. Pour the coffee into an airtight container and make sure the container is completely closed. Coffee will keep for several days in the refrigerator, but be aware that coffee stored in the refrigerator can easily absorb odors from other foods.
3. Freeze If you have a lot of leftover coffee, consider freezing it. Pour the coffee into an airtight container, making sure to leave some space in the container, as the coffee will expand during the freezing process. When it's time to use, just thaw the coffee and heat it up. But it should be noted that freezing will affect the taste and quality of coffee, so this method is not recommended for frequent use.

4. Prevent peroxidation The caffeine in coffee will undergo peroxidation, which will lead to a decrease in the taste and quality of coffee. To prevent this from happening, leftover coffee can be spiked with some acidic ingredients, such as lemon juice or vinegar, before storing. This can help prevent the coffee from peroxidation and preserve the freshness of the coffee.

5. Make good use of leftover coffee If you do have some leftover coffee but don’t want to waste it, consider using it for other purposes. For example, coffee can be added to cakes or biscuits, or it can be used in cooking or flavoring. All in all, storing leftover coffee properly can help you save time and money while also reducing waste. Hopefully these tips will help you better store your leftover coffee.

Types of coffee packaging materials:
Nowadays, people's aesthetic concept is constantly improving, and the requirements for product packaging will naturally increase, especially the packaging materials related to product safety, which are more concerned by consumers. Take coffee as an example. It is very common in our daily life, and its packaging materials are also quite diverse. Let’s take a look at the functions of different coffee packaging materials, so that companies can choose when designing coffee packaging.

1. Bag coffee. The packaging material it chooses is mainly paper, cellophane or paper, and hydrochloric acid rubber film. The advantage of this packaging material is to isolate coffee products from oxygen and prevent coffee from oxidizing in the air. In addition, there are polyester, aluminum foil, polyethylene, polyester, polyvinylidene chloride, polyethylene, polypropylene, polyvinylidene chloride, polyethylene and nylon, polyvinylidene, polyethylene and other structural materials, which are not only suitable for vacuum packaging of coffee, but also suitable for inflatable packaging of other products.

2. Boxed coffee. The lining bag material of its inner packaging is mainly made of polyester, aluminum foil, and polyethylene composite materials. The inner layer of polyethylene is a heat-sealing layer. High-density polyethylene should be used instead of low-density polyethylene. Although low-density polyethylene has good heat-sealing performance, it will react with coffee oil and cause coffee to deteriorate.

3. Coffee in metal cans or glass cans. They are usually paired with vinyl plastic caps, and after consumers open and drink, they should close the cap tightly to prevent the coffee from being exposed to air, oxidation or moisture.

4. Instant coffee. Its packaging is generally made of paper, aluminum foil, and polyethylene packaging materials for soft packaging of coffee, which can also achieve a good effect of moisture-proof agent and oxygen barrier.

"What functions do different coffee packaging materials have?" This is a question that companies must give priority to when designing coffee packaging, because the choice of materials is not only related to product protection, transportation, etc., but also has a lot to do with product positioning.