Imported coffee smells good? Illy is not as good as your own freshly baked beans!

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Illy is one of Italy's three national treasures, but to put it bluntly, illy is a commercial bean. It has been in China for several months, and even nitrogen protection is not fresh.

It is not as good as some freshly baked beans in China.

-- what I said

Illy

Founded in 1933 in the seaport city of Trieste in northeastern Italy, illy Coffee Company produces more than 11 million kilograms of high-quality coffee beans every year, ranking among the high-quality leaders in the coffee industry.

Admittedly, to a large extent, illy's espersso standards (powder content, pressure, water temperature setting) have had a profound impact on the second wave of coffee culture. Of course, it is respectable to have the ultimate cup of coffee. For most groups, however, they drink coffee in the morning not because they are salivating, but largely because they need a cup of coffee to cheer them up.

What's the difference between red cap, black lid and green lid illy coffee beans?

The baking degree is different. The red lid is a medium-roasted coffee bean with a light bitterness and a heavier sour taste than the black one. The black lid is deep baked beans, focusing on the scorched taste. People who like bitter taste can choose, less sour taste. Green lids are decaf beans.

Moreover, the domestic boutique baking industry is springing up like bamboo shoots after a spring rain, why do many shopkeepers still choose to import illy coffee beans?

Does inert gas seal really have nothing to worry about?

Although one of illy's greatest inventions is the canning of inert gas, which extends the life cycle of coffee beans. But is inert gas omnipotent?

Take a look at the production date first. if it is right, it will be out of the factory for some time. Some are even 5-9 months old.

Although canned and filled with nitrogen, it reduces volatilization and oxidation. But it is canned in the form of powder after all. Once opened, the oxidation rate is still quite fast, and the longer the opening time, the more flavor attenuation.

Let's find out.

The culprit that destroys the freshness of coffee:

Oxidation: the number one killer of good coffee

Fruit is easily oxidized after it is cut; similarly, coffee is easily oxidized after roasting. When coffee is roasted directly, it produces a large amount of carbon dioxide inside and outside the cell. this carbon dioxide is hidden inside and outside the cell, forming a protective layer, isolating oxygen and slowing down oxidation; however, with the passage of time, this carbon dioxide will gradually lose its function of protecting coffee.

At first, carbon dioxide is released very fast, and it slows down gradually after a few days; after about 10 days, it can release about 50% of carbon dioxide, and after 60 days, it will lose about 90%. The inside of the coffee bean will no longer be able to release carbon dioxide to protect itself.

Because carbon dioxide has the effect of antioxidation, we often see in some media reports that drinking coffee can prevent aging. Although this statement can not be proved, but the effect of drinking coffee can activate thinking has long been recognized by everyone.

It is also mentioned that after the coffee bean is ground, the cell wall will be completely destroyed, and the carbon dioxide will be completely lost within a few minutes, causing the coffee powder to undergo merciless oxidation. Therefore, grind coffee must be drunk as soon as possible! And this is also the reason why selected coffee stores only sell coffee beans and do not buy coffee powder, which is indeed reasonable.

Volatilization: the second killer of good coffee

After roasting, hundreds of new compounds occur inside the coffee beans to form aromas and flavors; some of these compounds are volatile and some are not. Unfortunately, the boiling point of good substances is very low, and these compounds are easily volatile.

Recently, the packaging technology of one-way breathable valve has emerged, which can make the carbon dioxide flow out of the bag without the inflow of oxygen, so it can keep the coffee fresh, which is called "fresh bag". Although its effect is good, the natural decay caused by volatilization can not be resisted.

Hydrolysis: the third killer of good coffee

Baked beans have a moisture content of less than 1%, and their pores are enlarged, making them easy to absorb moisture. Some people even put unused coffee beans in the refrigerator as a deodorant. After absorbing moisture, the interior of the coffee bean will be hydrolyzed.

The hydrolysis of organic compounds is very small, usually through acid or alkali to increase the rate of chemical change, but coffee beans contain a lot of acidic and alkaline substances (caffeine is a kind of alkaloid), so hydrolysis is bound to occur.

Light damage: the fourth killer of good coffee

[light] is the catalytic role of catalysis, which can increase the rate of coffee oxidation and accelerate the deterioration of coffee. In some advanced countries, it can be found that their coffee bags are opaque.

Oil production: the fifth killer of good coffee

After baking at a high temperature, the oil inside the coffee beans will flow to the outlet of the cell pores, leaving a thin layer of oil on the surface. Lipids are the source of mellow flavor and should be cherished. However, after coffee beans have been stored for too long, the oil is easy to come into contact with water molecules, which can accelerate oxidation and cause corruption.

Oil is a sticky substance, out of oil for too long it is easy to condense coffee powder into blocks, in brewing, will hinder the infiltration of hot water, resulting in incomplete brewing phenomenon, and reduce the coffee should have powder flavor. Especially in brewing espresso, caking has a greater negative impact, which makes high-pressure hot water can not pass through the coffee powder, but only through the side slits, resulting in uneven brewing.

You may ask, which is better, illy or freshly baked Italian beans?

Coffee of the brand illy is available in many places. Many coffee lovers even use it as a benchmark to compare the taste and flavor of other brands of coffee.

But I still choose freshly baked beans, !