The difference between sun treatment and raisin treatment of coffee beans is whether they are made in the shade.

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Drying method:

1. Directly exposed to selenium in the sun to make brown raisins.

2. Air in the shade room

3. In the rapid drying method, the grapes are first treated with dehydrating agent, and then dried in a shade room or dried in a dryer, which greatly shortens the drying time.

Picking: unripe coffee berries are barely acceptable in the sun, so they can be picked by machine.

Cleaning and screening: if the berries are allowed to ripen on the treetops, the berries will eventually dry themselves, and during this period the pulp will slightly ferment, making the beans fermented or medicinal.

In order to avoid mixing with this kind of dry berries, some of the more exquisite manors soak the berries in water and take advantage of the different specific gravity to remove the dried fruits floating on the surface and the unripe fruits sinking at the bottom of the water.

Drying: machine or sunlight can be used to dry, but the cost of machine drying is higher, unless necessary as far as possible.

The usual practice is to spread the berries on the grain drying ground for about twenty days. Like drying millet, during berry exposure, you should often turn over with wooden rake and spread rain cloth or put it away in case of rain, so as to prevent Rain Water from fermenting the pulp. This is also the reason why you have to wash in rainy places.

In the process of solarization, it is not that the pulp does not ferment, but because the humidity decreases too fast and the fermentation is incomplete.

Shelling: the dried berries are packed and sent to the cooperative, and the hard shells formed by dried pulp and paper are ground off at once with an expensive sheller. But most of the silver skins will remain on the coffee beans.

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