In terms of taste, instant coffee has little resemblance to freshly brewed coffee. Actually instant coffee doesn't actually contain coffee beans; It is simply a solution with the aroma of dry coffee, which is the product of a complex brewing process. The process begins by passing water through a series of cylinders filled with ground coffee beans.
Each of these cylinders is heated to a different temperature, and at least one cylinder is pressurized to achieve a more complete extraction. One of the reasons why instant coffee tastes bitter is because the coffee grounds that burn during the extraction process are exposed to temperatures up to 180 °C. You can also order Starbucks instant coffee capsules online via Fengany.
The coffee solution is then filtered prior to the concentration stage to remove unwanted particles. Here the water is removed from the coffee solution to enhance the taste. There are several techniques for doing this, one of which involves further heating the solution to evaporate the water. At this stage, the coffee solution becomes dry.
There are two commonly used methods; spray drying and freeze drying. The spray drying method is quite complicated, but the basic principle is to spray hot air through the coffee solution to evaporate the remaining water. With freeze-drying, the coffee solution is quickly frozen into blocks, which are then broken down into small particles.
These particles are then heated in a vacuum where the ice is evaporated and removed. All the different stages and high temperatures involved destroy most of the natural flavors found in coffee. Therefore, the dry form of the coffee solution can be boiled as well as bitter.