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  • Appendix to plate IX · section 02 of 06

    The washed process

    THE PROCESS IN MOTION

    What does the washed process remove, and in what order?

    Start the scene or choose a stage. The animation simplifies the mechanism; what follows gives the details and the available references.

    Removing the flesh

    Before drying, the flesh of the fruit is removed. The bean keeps its parchment, the hard, straw-colored shell that protects it, and whatever sticks to it.

    Read the stages without animation
    1. Removing the fleshBefore drying, the flesh of the fruit is removed. The bean keeps its parchment, the hard, straw-colored shell that protects it, and whatever sticks to it.
    2. The mucilage stays stuckWhat sticks is the mucilage: the sweet, sticky flesh that surrounds the parchment.
    3. Breaking it down in a tankThe coffee goes into a tank where the mucilage is broken down. This page gives neither the duration nor the details: the chapter’s sheets describe them.
    4. WashingThe broken-down mucilage is then washed off: the water carries it away. That is what makes this route the one that uses the most water.
    5. Drying the parchmentWhat remains, the parchment coffee, goes off to drying. This is the route that gives the cleanest cups.

    To remember: The flesh first, the mucilage next, everything before drying: the cleanest cups, and the most water used.

    Read the full article and its sources ↓
    A gloved operator feeds a mechanical pulper, red bucket in hand, cherries spilled on the ground.
    Cherry pulping at a Ugandan washing stationErinamukuta · CC BY-SA 4.0

    The flesh is removed before drying. The mucilage, the sticky layer stuck to the parchment, is broken down in a tank and then washed off. This is the route that gives the cleanest cups, and the one that uses the most water.

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