Introduction to fresh Coffee beans how to choose fresh Coffee beans & how preserves Coffee beans

Many friends think that freshly ground coffee represents freshness, but it is not. In fact, if you want to drink the aroma of coffee, you should not only grind it, but also have certain requirements on the baking time of coffee beans. Qianjie Coffee has always emphasized the freshness of coffee beans, high-quality coffee beans must be freshness first. Because coffee beans basically have no flavor more than 50 days after baking, we will remind guests that the taste period of coffee beans is less than 30 days, and the best taste period is within 14 days after the bean cultivation period. This time, Qianjie Coffee is going to talk about how to choose fresh coffee beans, and why do coffee beans grow beans? How long is the coffee tasting period and how to keep the coffee beans?

How to choose fresh coffee beans?

First of all, the selection of products should be clearly marked with the baking date (not the effective date or shelf life), brand reputation, emphasis on fresh roasting professional coffee roasters to choose and buy. In addition, excellent coffee bags are usually designed with a "one-way exhaust valve" (a button-shaped hole in the top of the coffee bag) for coffee beans to discharge naturally occurring carbon dioxide. Point the one-way exhaust valve at the nose, gently squeeze the coffee bag and smell the gas. If it is a charming and fragrant coffee aroma, the freshness is not a problem. On the contrary, if it does not smell strong enough, or even smells of smelly oil, it means that this bag of coffee has already gone bad and should be avoided. Every packet of coffee beans sold in Qianjie Coffee is packaged with an one-way exhaust valve to ensure that each packet of coffee beans is in the freshest state to lovers.

Why do coffee beans need beans? what are beans?

About 2% of the weight of freshly roasted coffee beans is carbon dioxide, and this large amount of carbon dioxide emits carbon dioxide with the storage environment, equipment, or method, making the pressure in the package higher than an atmospheric pressure. the pressure helps to integrate aromatic substances with oils, making it easy to extract all the aromatic substances inside the coffee beans. Bean cultivation is the process of "gas release", which is also commonly known as awakening, raising beans or ripening. Because the baking methods of each baker are different, the baking depth is different, and the damage to the structure of coffee beans is also different, so you can ask the store at the same time. The coffee beans for Qianjie Coffee are recommended as follows: light roasting in 5-7 days, medium and shallow roasting in 3-4 days, medium and deep roasting in 2-3 days, and Italian beans in espresso generally take about 15 days. Because espresso beans belong to deep baking, if the time is not enough, hot water will be encountered with a certain amount of exhaust, affecting the extraction, resulting in extraction instability. Just leave the beans in the original package and place them in a cool, moistureproof place so that the coffee beans release ​ carbon dioxide. ​

What is the difference between the taste period and the shelf life of coffee beans?

In general, the best taste period of coffee is reflected in the roasting of coffee, the peak of flavor after 3-7 days of soy cultivation, and then it will be lost over time, leaving only woody flavor. The first flavor compounds lost are mainly volatile compounds such as flower and fruit aroma, while water-soluble compounds such as sugars, nuts and chocolate are relatively difficult to volatilize.

Therefore, the general coffee appreciation period is recommended in the 4th to 30th day after the baking date. Just because the taste period is over doesn't mean the coffee can't be drunk, but it will be slightly inferior in flavor. This should be distinguished from the shelf life of coffee. Generally speaking, the shelf life of ripe coffee beans is between half a year and a year.

How to preserve coffee beans?

1. Sealed moisture-proof tank

Put the raised coffee beans in a sealed moisture-proof and light-proof jar and store them in a cool place. Pay attention to avoid coffee beans directly exposed to the sun, or in wet places, light will accelerate the volatilization of aromatic substances, so that the appreciation period of coffee is reduced. The storage place is too wet, moisture-proof cans do not have much effect, coffee beans are easily exposed to moisture to produce unpleasant and flavor, serious cases will be moldy. Coffee shops put in transparent sealed cans are often beautiful, displayed, and coffee beans are consumed quickly, so it won't have much impact.

two。 One-way exhaust valve tank

The one-way exhaust valve tank is like the one-way exhaust valve packaging mentioned above, which emits carbon dioxide and blocks the entry of external air at the same time.

3. Original package preservation

Preservation in the original package is the best choice when there are no other utensils. There are one-way exhaust valves and seals on the original package. But! Be sure to pay attention to moistureproof. The original packing is very weak in moistureproof. Coffee beans preserved in the original package are recommended to be finished within 14 days.

Note: do not keep it in the refrigerator

Coffee beans can not be kept in the refrigerator! Because coffee beans can absorb flavor, it is easy to absorb the taste inside the refrigerator, and the moisture in the refrigerator is also easy to enter the packaging of coffee beans, affecting the preservation of coffee beans.

Note: do not grind coffee beans into coffee powder for preservation

After grinding into coffee powder, the area of coffee beans in contact with the air increases, the oxidation is faster, the aroma volatilizes quickly, and the flavor will soon disappear, so the coffee is ordinary.