About some coffee beans.

People need to put coffee from different places together for several different purposes. The ideal goal, of course, is to piece together a coffee that tastes better than any of them. But generally speaking, Arabica coffee from a single origin is enough to make coffee that tastes good for export; it has a delicate flavor, a soft taste and a sweet aftertaste. So there is no need for "blending" (that is, putting together coffee from different places). The main commercial purpose of blending coffee is to reduce costs and mix coffee with coffee that is not very good. In order to improve sales profits. There is also a possible purpose, that is to put together a unique taste, the unique taste of a brand. Customers who like this taste have to go to this factory to buy it, but can't get it from other suppliers. Another advantage of this is that the taste of the blended coffee will not change no matter how the taste of the coffee from different years changes in some places. We are here to ignore other possible commercial purposes and concentrate on understanding the blending for the purpose of improving the taste and quality of the coffee. Before blending any coffee, you should first understand the taste characteristics of all kinds of coffee, and at least make it clear in your heart that the taste of the kind of coffee you want to mix can not be achieved by any single coffee. It would be a pity if the blended coffee doesn't taste better than one or more of them. It would be better not to match. If you use some pretty good quality coffee for blending, the result is likely to be so. The average blended coffee does not need to use more than five kinds of coffee beans. Because if there are too many kinds of coffee beans, the situation can be very complicated. Almost only a very special expert would not be confused by so many different coffee beans.