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Coffee Processing (Practical Action Technical Brief)
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== Dry processing == === Drying === The entire cherry after harvest can be placed in the sun for 10-14 days to dry on tables or in thin layers on concrete drying areas. Once the skin is dry, the pulp and parchment are removed from the bean. The bed depth should be around 3 cm and the cherries should be raked frequently to prevent mould-growth, fermentation or discoloration. However, contamination by dust and dirt blown onto the produce is a problem, and rain can soak the produce very quickly. === Solar drying === Figures 1 and 2 are designs for two solar driers - the solar cabinet drier and the Exell solar drier. The coffee should be placed in the trays in the solar drier no deeper than 3 cm and it is better if the whole tray area is covered. [[File:coffee processing solarcabinet.jpg|thumb|150px|right|Figure 1: The solar cabinet drier]] The drier should be filled with coffee as early in the day as possible so that all possible sunlight hours are used. The coffee should be stirred regularly so that a uniform colouration is formed. At night, the crop should be transferred to a cool dry room to prevent moisture condensing on the coffee.
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