How to keep the bagged coffee beans sealed? Do not expose coffee beans in transparent sealed cans!

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The most scientific coffee bean purchase and preservation guide, see here! Coffee bean preservation guide

"Better buy a bean grinder than a bag of premium coffee powder." Lin Zhehao, a certified appraiser of the International Coffee Quality Society, recommends coffee lovers to buy their own roasted coffee beans for home storage, and it is best to grind and brew them themselves, so as to shorten the shelf life as much as possible.

There are three factors that affect the preservation of coffee beans: temperature, humidity and oxidation rate. Lin Zhehao suggested that if you want to taste good coffee, it's best to buy freshly roasted coffee beans. One week_two weeks after roasting will be the best tasting time for coffee. It will be put into a month at most. The longer it is stored, the easier it will be oxidized and taste, and even the smell of oil consumption will appear. The flavor is relatively not so good.

NG Behavior 1: Put coffee beans in a transparent airtight jar and expose them to light

Freshly baked beans must be stored in the shade. After grinding coffee aroma molecules are easy to volatilize, and the length of coffee preservation is related to packaging technology, the current common packaging is sealed bags or one-way exhaust valve bags, one-way exhaust bags can slow down the oxidation rate, the same, some people used to put coffee beans in sealed cans, opaque cans will also be better than transparent cans, can avoid light exposure, slow down aroma volatilization and oxidation rate.

NG Behavior 2: Put coffee beans in the refrigerator to avoid mold

In addition, coffee beans must not be stored in the refrigerator, whether refrigerated or frozen. The reason is that when you take coffee beans out of the refrigerator at a relatively low temperature, there is a difference between the room temperature and the temperature in the bag. Moisture will adhere to the surface of the bag. After opening, moisture will enter again. Put it back into the refrigerator and it will regain moisture. If you want to put it in the refrigerator, it is best to use it separately. A bag is a one-time use.

NG Behavior 3: Buy beans that smell like oil

To see if the beans stored in the coffee shop are new or not, you can see if there is a layer of oil attached to the appearance of the transparent container, while the coffee beans that are deeply roasted will have oil shine, and they will dry out for a long time. The coffee that is lightly roasted is just the opposite, and the oil shine will run out for a long time. Coffee that smells like oil also means it has been stored too long.

In addition, the freshness of coffee beans can be observed when hand brewing: relatively fresh coffee hand brewing, less bubbles, coffee powder will sink, because the carbon dioxide in the beans volatilized faster after grinding, oxidation rate increased, structure changes, water bubbles floating relatively small. After grinding, the filter bag coffee is easier to see collapse.

Coffee beans from post-processing to transportation preservation, high temperature and humid environment is breeding ground for ochratoxin A, imported corn and soybean transportation process will also produce,"Coffee Science" author Han Huaizong stressed: "You will not see ochratoxin A on coffee, toxin is mold growth metabolism things, eat mold and will not die." Most commercial green coffee beans are stored and transported from Central America to Japan. It takes about two to three months to come to Taiwan after a while. If they are placed at the bottom of the cabin near the motor, they are easy to produce ochratoxin A. If they are transported, they are easy to get wet in the warehouse in summer.

To buy peace of mind coffee beans, you can find a store from the neighborhood, and communicate with the owner of your own roasting shop to buy. Taiwan's own roasters have one of the highest densities in the world, and choosing freshly roasted coffee beans is relatively easy."Compared to foreign roasters importing packaged coffee beans in large quantities, small roasters offer fresher beans with higher turnover rates," says Lin.

Saving Coffee Beans Tips :

1. Choose small packages when buying, don't hoard beans, buy as much as you drink, and try to speed up turnover.

2. Roasted coffee beans have a shelf life of no more than one month.

3. Bean bags stored in one-way venting are better than compressed jars. Optional opaque jars are stored in a cool place.

4. If you want to put it in the refrigerator, please pack it into individual sachets and pack it into a single drink.

Noun dictionary

ochratoxin A

It is a secondary metabolite secreted by Penicillium and Aspergillus, which is a secondary metabolite with renal toxicity, immunosuppression, carcinogenicity, etc., belonging to Class 2B carcinogen. Under Ministerial Order No. 1021350146, the Food and Drug Administration (FDA) revised the limit for mycotoxins in food to 5 ppb or less for ochratoxin A in roasted coffee beans and coffee powder, which is the same as that of Codex, the European Union and China. To ensure food safety for the public, the Food and Drug Administration sampled 87 roasted coffee beans and coffee powder from January to July 104. No ochratoxin A exceeded the standard and all met the requirements.

Bagged Coffee Bean Brand Recommendation

Front Street Coffee freshly roasted single-item bagged coffee beans are fully guaranteed in brand and quality, suitable for brewing in various appliances. More importantly, the cost performance is extremely high, a bag of half pounds 227 grams, the price is only about 80-90 yuan. According to each cup of coffee 200 ml, powder water ratio 1:15 to calculate, a pack can make 15 cups of fine coffee, each cup of coffee only costs about 5, 6 yuan, for coffee shops sell dozens of pieces of a cup price can be said to be extremely cost-effective.

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