How to remove the silver skin of coffee beans is an essential factor in the flavor of coffee.

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Qianjie-Coffee Silver skin introduction

What is silver skin?

It means that there is a thinner film inside the parchment that wraps the coffee beans. Because the color is glossy and silvery, it is called "silver skin". In the baking process, the silver skin on the surface of raw beans will fall off while the moisture is removed. As the air flow in the roaster boiler is discharged into the silver collection bucket.

When grinding beans, you will often see a lot of dandruff floating out, which may be golden (such as water washing light to moderate baking), yellowish gray (such as deep baking in water washing treatment, or light baking in sun treatment), or invisible to the naked eye (such as deep baking, or various baking degrees under honey treatment). They are called silver skins. The structure is similar to the skin on the outside of peanuts.

They are often put into a filter cup together with coffee powder for extraction. Some people will hate them very much, think that silver skins are dirty, and even try their best to get rid of them.

In the process of baking beans, the "outer silver skin" on the surface of raw beans will fall off together with the discharge of water, and will be discharged to the silver skin collection bucket with the air circulation in the baking machine boiler. The silver skin in the gap between the coffee beans will be left in the coffee beans, called the "inner silver skin".

If the outer silver skin is not discharged in time, it will be scorched by the high temperature in the boiler, and it will feel astringent when the outer silver skin is extracted with obvious coke state under the same conditions after baking. A baker with basic knowledge should know when the outer silver skin will fall off and use the throttle to let it out.

Most of the inner silver skin will not be removed during the baking stage. The inner silver skin is deeply involved in the fermentation in the initial treatment stage of raw beans, with regional flavor and sweetness.

Knowledge: the so-called coffee silver skin is the last protective film on the surface of our coffee beans and coffee beans. It will stick to the coffee beans all the time in the state of raw beans.

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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