What is the difference between wet planing and washing? Flavor characteristics of Indonesian coffee beans in the process of wet planing

What's so special about wet planing?

In fact, we can also see the clue from the name, wet planing means to remove a substance when the coffee bean is not dry, and this substance is the sheepskin of coffee beans, also known as endocarp. Like other coffee treatments, the sheepskin is peeled off before the coffee is exported, while the special feature of the wet planing method is that the sheepskin is shaved off in the process of processing.

Why does Indonesia use wet planing to treat coffee beans?

Indonesia is hot and humid all the year round, lack of sunlight for a long time, and the humidity is as high as 70-90% all the year round, so it is obviously unrealistic to rely on pure sun treatment. For the changeable weather in Sumatra, it is difficult to free up a week's sunshine for drying coffee beans, so the wet planing treatment method arises at the historic moment, after the previous washing process. Put the coffee beans with sheepskin in the sun for 1-2 days, make the coffee beans have a moisture content of 30-50%, and then take off the sheepskin for sun drying, which can speed up the drying speed of coffee beans and greatly shorten the drying time.

Wet planing treatment process

① picks fresh coffee fruits after flotation, and some low-density fruits will float on the surface. These are bad coffee fruits.

② removes the exocarp and pulp of the coffee fruit and puts it into a clean pool to soak and ferment for 12-36 hours (as the case may be). The aim is to break down the pectin layer attached to the coffee bean. So far, it is the process of washing treatment.

③ exposed the coffee beans with sheepskin to the sun for 1-2 days. If the weather is sunny for both days, the moisture content of the coffee beans is almost 30-50%. At this time, the coffee beans are semi-soft and semi-hard.

After ④, only use the shell planer to remove the sheepskin of the coffee beans, so that after about two days of exposure, the moisture content of the coffee beans can almost reach 12%. This treatment greatly reduces the processing time, for Indonesia, which is cloudy and sunny, wet planing can better ensure the completion of coffee processing.

The smell of Manning

Mantening coffee is very easy to distinguish between flavor and bean appearance, because wet planing removes the sheepskin of coffee beans that are still in a semi-soft and semi-hard state. Under fierce sun drying, coffee beans are easy to burst and form a "sheep's hoof" shape. Therefore, it is also known as sheep's hoof beans, not defective beans.

And because the wet planing method greatly shortens the drying time, the sour taste of coffee beans is greatly reduced, the alcohol thickness is significantly increased, and the aroma of caramel is obvious, with a slightly herbal fresh aroma.

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