What is the difference between coffee tanning and washing?

Introduction to Coffee processing

The fruit begins the process of sun drying without treatment after picking. This is the oldest method of treatment in existence. The drying process usually lasts about 4 weeks. The method of handling must be very strict to ensure that the coffee does not lose any flavor. The natural sun method requires the local climate to be extremely dry. In some areas, people use dryers to assist in the drying process of coffee fruit (the hot air of the dryer can speed up the drying process and help people control the degree of dryness) Brazilian coffee fields are endless and are mostly harvested mechanically to achieve economic benefits. When 75% of the coffee fruit in the coffee garden turns red, mechanical harvesting is started, followed by the same pre-washing operation, which is moved into the sink to remove floating beans, sift out the sunken beans, and then use a large pulp screening machine to dig out the pulp and remove the pods covered with pectin. The next stage is separate from the washing method: the sticky pods do not need to be moved into the tank to ferment, but to the outdoor bean drying farm. Because of the dry climate in Brazil, the sticky pectin on the pods will harden in about a day or so. Then use a large number of manpower to turn up and down, so that the pods dry evenly inside and outside, so as not to return to moisture and stink. For about two to three days, with the help of the natural forces of sunlight and dry climate, the pods can achieve a certain degree of dehydration. Then further dry with a dryer, the water content is reduced to 10.5%, and the pods are stored in a special container for about 10 days to further mature, in order to stabilize the quality, remove the sheepskin (pods) before export, remove the coffee beans, and pack them in grades.

Water content

The water content of washed coffee is 12% 13%, while that of dry coffee is 11% 12%. General coffee beans show different colors due to their different water content, with higher water content being green or cyan, and less brown or near white. Therefore, the washed coffee beans show a darker green.

How to tell whether coffee beans are insolated or washed?

Is the silver skin in good condition?

In the process of processing, the washing method usually removes the silver skin from the coffee beans, showing a special luster, but the law of drying and refinement only takes off the coffee shell, and the silver skin is still intact.

How to tell whether coffee beans are insolated or washed?

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Baking degree

Different processing methods use different degrees of baking, the effect is also different. In general, if the water-washed coffee beans have not been deeply roasted, the residual silver skin of the central line still exists. Although the silver skins of dry coffee beans are intact during processing, they are all gone after baking. The deeper the roasting, the darker the coffee beans.