The difference between the flat knife and the ghost teeth of the bean grinder-the difference between the coffee grinder and the good one

The difference between the flat knife and the ghost teeth of the bean grinder-the difference between the coffee grinder and the good one

The upper and lower cutters of the flat knife are placed in a parallel manner, so the coffee beans need to rely on the rotating force of the bottom cutterhead to push the coffee beans into the cutterhead, so the weight of the coffee beans placed on the top will affect the uniformity of the coffee beans entering the knife cutter. in addition, due to pushing, the number of collisions between coffee beans increases, resulting in an increase in the proportion of fine powder. This is the reason why the particle uniformity of the common flat knife bean grinder is slightly worse and the fine powder is more.

Bean grinders are often directly ignored in coffee recruits! This is a really sad fact! Many novices buy coffee powder directly in the supermarket. But friends with a little common sense will know that the shelf life of coffee after roasting is very short. It is generally recommended that freshly baked beans should be drunk within 1 month! Because in a month's time, the elements in the beans that can bring you the ultimate flavor will be quickly lost. Coffee ground into powder oxidizes faster because of its larger contact area with air. Generally speaking, 15 minutes after grinding is enough to turn the original boutique coffee into waste. That's why some people or merchants always advertise that our coffee is freshly ground coffee! Although sometimes those merchants themselves do not understand why they want to grind!

Some friends here will say, as long as it is not grinding right now!? I bought a few dozen yuan of spiral bean grinder on Taobao and now I can OK it. In fact, as long as your beans are good enough and fresh enough, it must be much better than buying coffee powder directly to brew and extract! But you still waste coffee beans! A spiral bean chopper (we call it a bean chopper because this machine crushes beans by chopping rather than grinding) not only can't process coffee beans into uniform coffee powder, but also generates a lot of heat in the process of chopping. Coffee powder accelerates the oxidation process when heated. The flavor will also be taken away! In addition, under the first principle of successful extraction of boutique coffee (uniform extraction), because the coffee powder particles chopped by the chopping machine are coarse and fine, it will also lead to the failure of coffee extraction! The most direct is excessive extraction, or insufficient extraction! The coffee with insufficient extraction will be sour and astringent, and the coffee with excessive extraction will be too bitter!

If you don't understand, a simple example is fried sour and spicy shredded potatoes. If some of the shredded potatoes you cut are thick and thin, then you will find that the thick ones are still raw when you stir-fry the fine ones and put them into the pan. But if you stir-fry the coarse ones, the fine ones will be fried into mashed potatoes! So a good bean grinder is the first product for good baristas in the field of boutique coffee, rather than coffee machines or other extraction tools! This is why the price of bean grinders with excellent performance can be tens of thousands of reasons!

The coffee particles ground by flat knife are flaky, and the flake can increase the area of cell wall, so using flat knife can increase the concentration and extraction rate of coffee liquid in a short time, so that the aroma of coffee can be significantly improved in a short time. At the same time, because the shape is long and the volume is smaller, when the extraction time becomes longer, the granular xylem will absorb too much water, resulting in increased miscellaneous flavor and astringent taste.

As for the conical knife, this is also ten thousand jin of oil. Except for the top MAZZER ROBUR, most other products are compatible with Italian and individual products. However, there is a serious differentiation between the two levels in the world of conical knives, either tens of thousands of top Italian bean grinders or low-end entry-level products! Household entry-level products are represented by BARATZA ENCORE, and most household-grade cones are compatible with individual products and Italian style. However, the quality of the product is of different opinions. Because the cone knife has high efficiency and fast grinding speed, a good cone knife will have the right amount of fine powder in the product can significantly improve the hierarchical sense of coffee, so the standard bean grinder in many top cafes will choose it. However, some people will feel that fine powder leads to miscellaneous smell in coffee extraction and restrains the cone knife. As for how to choose, you really have to try this for yourself to understand! After all, what suits your taste is the best! Taper cutters are also favored by most manual bean grinders because of their high grinding efficiency. HARIO 2TB grinder Lido is designed with taper knives.