Internal settlement of the structure of coffee fruit what is the silver skin of coffee beans and what effect does it have on coffee beans?

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Qianjie-introduction to the structure of coffee beans

The essence of coffee beans is the seeds of plants. Coffee cherries (commonly known as coffee fruits) need to go through a series of processing processes from seeds to cups after they are ripe and picked. Here we will take you to understand the internal structure of coffee cherries, understand coffee, love coffee more! Figure 1 shows from 1 to 7: centerline, seed, silver skin, endocarp, pectin layer (pulp), mesocarp, exocarp.

1:center cut [2] midline

2:bean (endosperm) coffee beans

3:silver skin (testa, epidermis) silver leather

4:parchment (hull, endocarp) fruit shell

5:pectin layer pectin

6:pulp (mesocarp) peel

7:outer skin (pericarp, exocarp) exocarp

Sometimes a small amount of yellowish-brown flakes can be seen in coffee cooked beans or coffee powder, which is called "silver skin". The silver skin is a thin film attached to the coffee beans. The silver skin usually in the gap between the coffee beans is called the inner silver skin, and the outside is called the outer silver skin. During the baking process, most of the silver skins of coffee will gradually fall off and discharge, while the inner silver skins are generally difficult to remove.

A little silver skin that has not been discharged is scorched at high temperature in the baking boiler, which has a little astringent taste after extraction, which has a little effect on the purity of the taste, but it is richer in taste.

The inner silver skin rarely falls off and is discharged, and because it is treated with raw beans with coffee, it will be accompanied by some flavor attributes of the place of origin. After baking, the inner silver skin has a more comfortable astringent taste, and the coffee is more layered.

Although the silver skin will have some effect on the flavor and taste of the coffee, it also improves the hierarchy and richness of the coffee. If the silver skin is removed completely, the taste of the coffee will inevitably be a little single.

Knowledge: when using the same kind of water, time is the key to adjusting the number of substances.

In short: Qianjie is a coffee research hall, happy to share the knowledge about coffee with you, we share unreservedly just to make more friends fall in love with coffee, and there will be three low-discount coffee activities every month. The reason is that Qianjie wants to make more friends drink the best coffee at the lowest price, which has been Qianjie's tenet for 6 years!

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