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ROASTING NATURALS: ETHIOPIA

7/18/2019

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As we all know, roasting high density coffees is difficult, but roasting high density dry process coffees is even more so!

What should you keep in mind to start developing your own killer roasting profile for natural coffees?
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​1º THE DENSITY OF THE LOT

During the washing process, there are many more opportunities for selection and grading than in the natural process. Although, lately in origins such as Ethiopia and Burundi, where there are cooperatives focusing on quality, they have begun to introduce hand selection and flotation grading, prior to the drying of the cherries on patios or African beds.
This "lack" of selection and grading during the dry process, generates big differences in the density, moisture content, sugar content and cellular structure of the beans of a certain lot.
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Therefore, to obtain consistent results during your roasting, it will be necessary to adjust your profile, which should be different from the one you use for high altitude washed coffees, and also different from the one you use for Brazilians naturals, since these beans are less dense than those from Ethiopia or Burundi for example.
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​2º METABOLIC EVENTS THAT OCCUR IN THE BEAN DURING DP

During the dry process, a series of important metabolic events occurs within the bean that are almost imperceptible to the human eye, but very much to the taste buds!

In the cell wall structure of the bean, there is a significant mutation of organic and inorganic compounds, a migration of low molecular weight sugars (such as sucrose, glucose and fructose), and a relative (but not absolute) increase of polysaccharides and acetic acid.
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​3º PRACTICAL ASPECTS TO CONSIDER

- Start your roast with a lower charge temperature. (25% less than  what you use your high-density washed profile is a good starting point)
- Try to stretch the drying stage, so you can "thermally align" the whole batch.
- Reduce the amount of energy input (with air flow and/or gas) when the crack begins, but without extending its development for more than 1.30 min.

We hope this article become useful and let us know in the comments what is your experience roasting natural coffees from Ethiopia or Burundi!
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Copyright © 2023 | Kilimanjaro Specialty Coffees España S.L.U. All Rights Reserved.
  • What We Do
  • Que Hacemos
  • Origins
    • Ethiopia >
      • Ethiopia Duromina
      • Ethiopia Biftu Gudina
    • Kenya >
      • Kenya Kaguyu AB
      • Kenya Kiangombe AA
      • Kenya Bungoma AB
      • Kenya Nyeri AB
      • Kenya Murarandia PB
      • Kenya Kiunyu AB
      • Kenya Githembe AB
      • Kenya Kabete AB
      • Kenya Kagumoini AA
    • Rwanda >
      • Rwanda Macuba
      • Rwanda Ngororero
      • Rwanda Mushonyi Anaerobic Honey
      • Rwanda Karambi Natural
  • Orígenes
    • Etiopía >
      • Etiopía Duromina
      • Etiopía Biftu Gudina
    • Kenia >
      • Kenia Kaguyu AB
      • Kenia Kiangombe AA
      • Kenia Bungoma AB
      • Kenia Nyeri AB
      • Kenia Murarandia PB
      • Kenia Kiunyu AB
      • Kenia Githembe AB
      • Kenia Kabete AB
      • Kenia Kagumoini AA
    • Ruanda >
      • Ruanda Macuba
      • Ruanda Ngororero
      • Ruanda Mushonyi Anaerobic Honey
      • Ruanda Karambi Natural
  • Education
  • Educación
  • Contact
  • Contacto
  • Home Roaster Corner
    • Green Coffee
    • Cupping Tools
  • Rincón del Home Roaster
    • Café Verde
    • Artículos de Cata