The difference between raw and cooked coffee beans and the introduction of the blending proportion of Italian coffee beans.

The difference between raw and cooked coffee beans and the introduction of the blending proportion of Italian coffee beans.

Different bean grinders have different adjustment dials, so you should check the model of the coffee grinder and read the instructions carefully to determine the direction and strength of the dial. In general, if you keep in the habit of checking the settings of the bean grinder, you only need to make very small adjustments. As long as you move the turntable within 3 mm, you can change the thickness of the powder. Although 3mm is a very small number, the grinding time of the same coffee beans will change by 3-5 seconds. When the coffee beans enter the grinder, the blade in the grinder will crush the coffee beans into powder. The smaller the distance between the blade and the blade, the smaller the coffee beans will be ground into smaller particles. The finer the grinding particles are, the tighter they are, and the more difficult it is for the water to pass through, thus greatly prolonging the extraction time. On the contrary, if the distance between the blades increases, the ground particles will become rougher, the flow of water will be easier to pass through, and the extraction time will be faster. To take a simple example, like stones and fine sand, water flows much faster through stones than fine sand, because there is more space between the stones for the flow of water to pass quickly. Therefore, correct grinding is very important, and the size of particles directly affects the quality of extraction.

Raw spelling can save a lot of time for bakers or bean suppliers, but do you want to think about the stability of beans and the taste trend of beans? I do not approve of baking after spelling, so I will assure my customers that I will never sell raw beans, absolutely take apart each bean for baking, and match it in a uniform proportion.

First of all, it is not the same time point and temperature point when every bean reaches a certain baking degree. Because the water content, size, and the softness and hardness of beans will all be due to the phenomenon of uneven baking, the professional point is that the specific heat of coffee beans is different, and the concept of specific heat generally refers to the heat energy required for coffee beans to increase by 1 degree Celsius. With different water content, the particle size of beans is different, although they are all heated with the same heat, but because of the different specific heat, the baking degree is easy to be different, resulting in uneven quality. In the words of teacher Taguchi, it is a miracle that different kinds of beans can be baked evenly together.

Give an example to illustrate the difference in baking degree caused by different specific heat. The concentrated beans used in our store pursue the high sweetness of the front, slightly sour in the middle, and the flavor of nuts and chocolate in the back. The mix is made in a certain proportion of Brazil, Kenya and Mantenin. I use the cooked bean matching method, which means that a single bean seed is baked first and then blended. During the baking process (the temperature displayed varies according to the design position of the baking furnace and probe) the temperature of the first explosion in Kenya is about 192 degrees Celsius, and the temperature of the second explosion is about 218 degrees Celsius. Mantenin's first explosion is about 196 degrees Celsius and the second explosion is about 220 degrees Celsius, while the temperature at which Brazil enters the explosion will be the highest, with the first explosion reaching about 202 degrees Celsius and the second explosion around 228 degrees Celsius.