Coffee mill (hand mill) and freshness of coffee

For a cup of fragrant coffee, it seems that no one will ignore the direct production tools such as coffee maker and coffee maker, and are willing to invest in this area, but in fact, before these instruments, there is a more important tool, that is, the coffee mill. Recently, many friends take coffee from me, but I find that many people need me to grind the coffee and then send it out. I usually refuse this situation, not because I don't want to grind it for you, but to tell you how important the freshness of the coffee is. I have read such a "three 15 principles":

Never more than 15 months of raw coffee beans

Never more than 15 days of coffee cooked beans (after roasting)

Never grind coffee powder for more than 15 minutes.

Maybe this principle is too "absolute", but from these three 15, we can see how important freshness is to coffee.

The aroma of coffee is attractive because it can be smelled by people and can be smelled, so these substances are floating in the air, which in turn shows that these substances are volatile. These fragrances will gradually disappear over time, and if you grind all the coffee beans into powder, they will disappear faster. The bag of coffee you paid for is not just the part of the aroma that floats in your mouth, so you pay for the aroma that can float in the air. I know you will be willing to share it, but you don't want to disappear before you can smell them.

It is precisely because of this that the "freshly ground" coffee appears to be more fragrant and more fascinating. In fact, it's easy to have your own freshly ground coffee. In addition to making utensils, you just need another coffee mill.

Here "Taiwan" refers to the electric mill, I think as a household, a few hundred yuan, or even thousands of yuan electric mill, if you are not an enthusiast, or "coffee control", it is not your first choice.

A handful of hand grinders, ranging from tens of yuan to one or two hundred yuan, will not add too much financial burden to you, but also make your coffee trip more romantic, which can be said to be the first choice for household use or coffee entry.

The picture is: Zhenghuang Coffee hand Mill cast Iron Grinding Core was purchased at 90 yuan in 2008.

At present, the main brands on the market include Hario (Halio), Tiamo, Zhenghuang, etc., the price is also basically according to these three brands from high to low, of course, the market is also full of counterfeits of 20-30 yuan, but I still suggest you buy authentic products, the price is between 90-300.

No matter what brand it is, the hand mill is mainly composed of grinding core, powder bin, bean bin, handle and adjusting device.

Grinding core is the most important part of a grinding, the grinding core on the market is divided into two types according to different materials, one is cast iron grinding core, the other is ceramic grinding core. The price of cast iron grinding core is relatively cheap, but according to the different quality, some will wear more seriously after being used for a period of time, thus seriously affecting the uniformity of grinding powder. At the same time, cast iron grinding core will produce heat during grinding, which will also affect grinding powder. And ceramic grinding core, hardness than cast iron, so the durability is better, and can effectively generate heat anyway, at the same time, because it is ceramic material, so it can be cleaned with water, but the disadvantage is that the price will be relatively higher.

The grinding plate and the grinding core squeeze each other to grind the coffee beans.

Another important part of hand grinding is the device for adjusting the thickness of the mill.

At present, most hand mills rely on this structure to adjust the gap between the grinding core and the grinding disc so as to adjust the thickness of the grinding powder, which may be very troublesome compared with the electric grinding. Every time you adjust the fineness of the grinding powder, you have to remove the handles, gaskets and other small pieces.

There are two kinds of bean barn designs, one is closed, the other is open.

This closed bean warehouse can effectively prevent the phenomenon of "jumping beans", that is, when grinding beans, individual beans will jump out due to extrusion, while the open bean warehouse will have the phenomenon of beans jumping out when grinding beans, which needs to be covered with hands to avoid the phenomenon of jumping beans.