Whether the influence of secondary grinding on coffee is great or not, where is it reflected?

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We all know that coffee is best to be freshly ground and brewed, but if you get the coffee powder from others, if it is a bag of medium-sized powder, you may want to grind it into a fine grind, and then use the second-ground powder to make espresso.

Re-grinding may block the bean grinder

This is the most important point. If the coffee powder is poured into the bean grinder and ground into a finer powder, it will cause the powder to fall from the knife head of the bean grinder as smoothly as beans, and not only can not get the desired fine grinding powder for espresso. It will also lead to more powder remaining in the knife plate of the bean grinder, resulting in grinding quality after contamination.

In order to remove the residue of these powders and restore the grinding quality, you must also disassemble the bean grinder and thoroughly clean the cutter head. Many bean grinder manufacturers do not advise guests to disassemble the machine themselves and may not even provide warranty service, which is not interesting when you do not go back to your original state and really want to drink coffee.

In addition, these second-ground powders are not suitable for brewing espresso, but can only be used for composting, deodorization and dyeing agents, because the powder in this state will be too fine for water to be extracted through coffee powder.

Even if you have a way to adjust the bean grinder and grind it to the right size without polluting the cutterhead, the re-ground powder will not be able to cook a full flavor concentration, the key lies in the aroma. Once the coffee is ground, the aroma will be released in large quantities, and the flavor of the coffee can be brought into full play through the correct brewing. And when you get the coffee powder, even if you grind it again, it is already the powder after a lot of aroma loss when brewing.

This is why we recommend grinding the coffee beans before brewing. It is best to brew the coffee powder within five minutes. When the coffee powder is ground in advance, even if it is placed in a sealed can or vacuum, the brewed coffee is still a cup of coffee that loses a lot of aroma and will not taste very good.