How to select and preserve bagged coffee beans _ relationship between packaging materials and shelf life of bagged coffee beans

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No matter what kind of coffee beans, freshness is an important factor affecting the quality. When buying bagged coffee beans, grab one or two coffee beans and chew them in your mouth. You should have a crisp sound (indicating that the coffee is not damp) and the fragrance on the teeth and cheeks is the best, but it is best to squeeze it with your hands to feel whether it is solid, rather than buying coffee with a crisp shell.

If the coffee bean has lost its fragrance or smells stale, it means that the coffee bean is no longer fresh and is not suitable for purchase. Freshly fried coffee beans are not suitable for immediate consumption and should be stored for a week to completely release the gas from the beans. Generally speaking, the best drinking period for coffee is a week after stir-frying, when the coffee beans are the freshest and the Aroma taste is the best.

In addition, the purity of coffee beans is also another consideration. The expert candidate for coffee is not necessarily to look at the size of the particles, but to grab a handful of individual coffee beans (Regional Coffee), about dozens of portions, to see whether the color of each single bean is the same, and whether the particles are similar in size and shape, so as to avoid buying shoddy products disguised as mixed beans. But if it is a synthetic bean (Blended Coffee), it is a normal phenomenon that the size and color are different. In addition, heavy heat and medium-deep stir-frying will cause coffee beans to produce oil, but if the beans are lightly fried, they have gone bad, not only reducing aroma, but also astringent and sour taste. In short, when buying coffee, we should pay attention to its freshness, aroma and whether it is stale or not, and the ideal purchase quantity is to be able to drink it in a month.

Preservation of bagged coffee beans

Factors affecting Coffee Preservation

The factors that affect the preservation of coffee include light, oxygen, humidity and temperature, so it is better to keep these four factors as low as possible during preservation.

The time change of coffee after roasting

The roasting degree has a direct effect on the preservation of coffee. The deeper the roasting is, the faster the oxidation deterioration is, and the lighter the roasting is, the slower the oxidation deterioration is. The unbaked raw beans can be preserved for 3-5 years or even longer under appropriate conditions. Irresistibly, the natural exhaust decay of roasted coffee.

The following is the time change of coffee beans after deep baking.

time

Internal changes of coffee beans

Taste the taste

2Murray 24 hours

The internal chemical reaction is still going on, when coffee beans release a lot of carbon dioxide, which we call the exhaust phenomenon.

The taste is dry and the aroma is not obvious.

1Murray for 3 days

The exhaust phenomenon of internal chemical reaction gradually alleviated.

It has an obvious fragrance and a dry taste.

3Murray for 15 days

The exhaust is stable.

The peak of rich flavor in taste

15 Murray for 30 days

The exhaust phenomenon is slowing down.

The taste is smooth and fragrant and slightly downhill.

30 days later

Stop venting.

The taste is gradually losing.

Packaging material of bagged coffee beans

Unidirectional exhaust aluminum bag general aluminum bag soft transparent bag PE hard transparent bag PP sealed iron can vacuum packaging

Preservation period

Up to now, there are many arguments about how coffee beans should be preserved. The shelf life indicated by various manufacturers ranges from two weeks to 18 months, so how long can coffee be preserved? The following is an one-year preservation test for coffee beans, which can be used as a reference for coffee lovers.

Brand recommendation of bagged coffee beans

Qianjie coffee freshly roasted single bagged coffee beans are fully guaranteed in brand and quality, and are suitable for brewing with all kinds of utensils. And more importantly, the performance-to-price ratio is extremely high, a bag of half a pound 227 grams, the price is only 80-90 yuan. According to the calculation of 200ml per cup of coffee and the ratio of powder to water at 1:15, 15 cups of fine coffee can be made in a bag, and each cup of coffee only costs about 5 or 6 yuan, which is very cost-effective for cafes to sell dozens of yuan a cup.

Qianjie coffee: Guangzhou bakery, the store is small but a variety of beans, you can find a variety of unknown beans, but also provide online store services. Https://shop104210103.taobao.com