Know a lot about high-quality coffee, how to select defective coffee beans and steps

Before selecting defective beans, raw beans need to be screened in order to make the beans uniform in size. You can use three different sizes of special custom screen, or you can use the metal screen sold in general horticultural shops, but pay attention to the size. The purpose of sieving is to separate the size of beans and remove impurities.

The next step is hand-selected. In order to improve the efficiency of hand selection, some props must be used, among which the necessary is the pallet selected by hand. Two kinds of trays should be prepared, one is a matte black tray for raw beans, and the other is a tray for baked beans and pasted with matte brown cotton paper. In the case of a large number of beans to be selected by hand, such a tray can keep the eyes from fatigue.

Here are the steps for selecting defective beans:

1. Put the right amount of raw coffee beans on the tray. The key point is the right amount, too much or too little is not good. Spread the raw coffee beans on the tray and divide the raw beans on the tray into five equal parts with both index fingers and middle fingers. A small amount of hand selection is less likely to miss defective beans and easier to concentrate.

2. Select the raw coffee beans until they are flawless.

3. Don't just stare at the side with beans, but pick it up to see its color and shape. Don't miss any one, move your eyes from the right to the left.

4. Repeat the same steps again and again.

5. Know the average value of picking out defective coffee beans.

If you pick out five or six defective beans in a tray, use this as the average to hand select the next tray.

The order of selecting coffee defective beans is "color-> luster-- > shape".

1. Beans of different colors. Figure out the basis for color selection, and then put the coffee beans of the same color together.

2. Beans with different luster. You can pick out dead and unripe beans according to the luster of coffee beans.

3. Beans with different shapes. Shell beans have a slight effect on the taste, so put it at the end of the treatment.

After the hand selection sequence of 1 to 3 becomes familiar, the overall judgment can be made. In this way, the speed of picking defective beans can be improved, and you won't get tired after working for a long time. The most important thing is to do it with both hands. The speed of hand selection will be faster, but it is also easy to be tired and unable to support the selection of defective beans for a long time, so it is recommended to choose with both hands.