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Question about Cracks!

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  • Question about Cracks!

    Dear all ;D

    There is something I dont understand, before when I roast coffee with diedrich in Taiwan, the 1st crack average is around 185c, and I realised that lots of roaster in Sydney actually have their 1st crack higher than that (also 2nd crack), can anyone explain why is that? and also, is there any different between this two?

    Daniel

  • #2
    Re: Question about Cracks!

    If you were at higher altitude, the crack starts at lower temperature ...

    http://www.sweetmarias.com/roasting-VisualGuideV2.html#high_altitude_roasting

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    • #3
      Re: Question about Cracks!

      Im in Newcastle, so a similar altitude to Sydney. I find that I get my first cracks at around 190ºC as well. This suggests to me that there may be a variable in the equation other than altitude, I cant quite put my finger on it though.....

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      • #4
        Re: Question about Cracks!

        I see.... I didnt know that before Thanks! ;D


        When the bean start to crack, it will release energy out, which means the heat will start to build up, so normally we lower the temperture down to let it increase by itself.

        But when I use GC last time, the temperture doesnt increase (use 200g), it actually stays with my setup temperture (229c), if I want to drop the temperture down, I am afraid that the actual temperture will drop what should I do?

        Daniel

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        • #5
          Re: Question about Cracks!

          Im in Sydney and my first crack average for PNG Kimel is 183.

          Im pretty sure different beans crack at different temps.

          What are you roasting in now?

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          • #6
            Re: Question about Cracks!

            Hi pulokidy

            I know theyre only trying to be helpful, but I suggest that what temps people get on different roasting apparatus to your own, using different beans, etc. are all pretty useless.

            Avacuppa (site sponsors) import the gene and have a very good resource of information in the following link. Start by reading the info there and then adapt the information to your own circumstances.

            http://www.avacuppa.com.au/mediawiki/index.php?title=Coffee_Roasting_Using_Gene_Cafe_(G C)_-_Tips_and_Techniques

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            • #7
              Re: Question about Cracks!

              OMG, This is exactly what I was trying to search for, thank you so much!

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