Coffee Damage under UV Light, originally uploaded by sweetmarias.
Ultraviolet light is useful to see problems with coffee like mold and bacteria, but these are things that affect low grade lots that are already quite damaged. However, when I suspect drying problems with coffee, I check it out anyway. Some recent SulawesiSulawesi coffees are low-acid with great body and that deep, brooding cup profile akin to Sumatra. The coffee is sometimes known as Celebes, which was the Dutch colonial... wet-hulled lots have been very surprising under UV light, and in general UV shows the problems with the wet-hull process overall (although our Blue Batak Sumatras fare well under UV light. This was a surprise. An EcuadorEcuador has everything it takes to grow great coffee. Positioned between Colombia and Peru, the interior mountain ranges have plenty of altitude, weather patterns, and ideal soil for...
Cariamanga lot with a nice cup, but some odd off notes cropping up way too often. The green coffeeGreen coffee refers to the processed seed of the coffee tree fruit. Coffee is a flowering shrub that produces fruit. The seeds of the fruit are processed, roasted,... loots PERFECT. But under UV light, small nicks, little marks were I suspect the pulper scraped against the coffee seed due to misadjustment. Then in fermentationFermentation in coffee processing traditionally referred to the stage in wet-processing of the coffee. We now understand that fermentation happens more broadly in nearly all processes, including honey... the damaged areas are in contact with mucilageMucilage indicates the fruity layer of the coffee cherry, between the outer skin and the parchment layer that surrounds the seed. It readily clings to the inner parchment... and bacteria, rather than being protected by the parchmentGreen coffee still in its outer shell, before dry-milling, is called Parchment coffee (pergamino). In the wet process, coffee is peeled, fermented, washed and then ready for drying... layer. The result is some off cups, but mysterious since there was little clue under normal light. I
could not get the coffee to “light up” completely under UV for the photo so the arrows assist in seeing the glowing areas, and then the 1 little pulper kiss marks can be seen.
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-Tom
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