-------How to distinguish between good and bad coffee beans:

Commonly, there are several steps:

1, smell

Generally fresh coffee beans will have a pleasant and comfortable aroma, the first thing we should first close to the nose of the coffee beans, and then y smelled, if the coffee beans have pleasant and comfortable aroma, on behalf of the coffee beans is fresh. Fresh, if it is not fresh coffee beans aroma will be very weak, beans after roasting placed too long will also have a burnt flavor or oil to stay flavor, it shows that the coffee beans are not fresh.

2, coffee powder expansion

Brewing coffee powder will produce expansion, but the degree of expansion of the coffee powder tend to be different. Coffee brewing surface will have a layer of white foam, that is the coffee oil esters, if the coffee powder did not expand, it is possible that the coffee is not too fresh, the more the foam expansion of the larger coffee represents the fresher.

3, coffee brewing flavor

Quality coffee brewing coffee surface smoke is not easy to dissipate and different regions of the coffee emanating flavor is not the same, if it is a delightful and comfortable flavor represents the coffee is fresh, anyway, it represents the not fresh.

4, drink will not feel upset

The deterioration of the coffee beans drink will appear upset stomach, such as stomach acid stomach, or chest tightness and so on.

It looks like you have a good color of these coffee beans.... The grains are also very uniform... I just don't know how the brewed coffee tastes? ..... Actually the world doesn't have a very specific concept of a good cup of coffee, as long as you like it yourself it's the best.