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Thread: 1st Roast Help :)

  1. #1
    m3m
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    1st Roast Help :)

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    I probably have made some fundamental mistakes here, i had a quick read through some guides and just did what came back to me at the time :|

    I Picked some fresh beans off my old mans coffee tree on friday afternoon, came home and extracted the beans, game them a quick wash with filtered water, and put them straight out to dry ( on window sill, gets occasion sun during the day and ventilation )

    So tonight, 4 days later i have them in the crazy popper ( unmodified ), now i heard one solitary pop at 8min30sec and then nothing really for the rest of the time until i turned it off ( 19min total )

    Attached is a pic of the result *( and green beans still left to roast later ), now i have no idea if the beans were dry enough to start with and im sure they may not have been processed properly, so any advice for the next lot i do would be much appreciated :)

    Cheers,

    Mark.






  2. #2
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    Re: 1st Roast Help :)

    Hi Mark, Im not too sure about drying times but it looks like to me that the parchment is still on the beans. Are they still encased in a papery/leathery skin?

    cheers
    Ian

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    Re: 1st Roast Help :)

    I think the green beans look kind of swollen, which to me suggests that they werent dried enough before roasting...

    I came across this link which gives some idea of how much you need to dry them. Reading between the lines, it looks like you want the beans to lose about 40-50% of their weight from the de-pulped to the ready-to-roast stage (ie. get the moisture content down from 60-70% to ~20%).

    The roast itself looks uneven, which might partly be because the beans werent dry enough, or it might be because they didnt dry evenly (?) - turning them more often during drying could help, as would drying them more slowly/gently.

    Other than that, Im totally jealous that you can pick coffee from the garden and dry then roast it. Thats cool as!

    Cheers
    Stuart.

  4. #4
    Mal Dimal's Avatar
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    Re: 1st Roast Help :)

    Quote Originally Posted by Javanation link=1220956096/0#1 date=1220960529
    it looks like to me that the parchment is still on the beans. Are they still encased in a papery/leathery skin?
    Yes I agree.....

    Looks like the parchment/mucilage hasnt been removed. Normally this is removed with a fermentation process (washed beans soaking in water for 16-36Hrs) and once the parchment has broken down, the water is removed and the parchment rubbed off and the beans washed again. It is at this time that you can start drying the beans, usually in a shaded airy environment, until the water content has been reduced down to about 12% +/- 1.0%. The easiest way to estimate this is by measuring the beans weight and calculate moisture loss. Shouldnt take more than 5-7 days at most.

    That info on the Coffee Research website, link provided by Stuart, is a great site for sourcing all sorts of interesting info and is well worth studying. All the best mate and hope you have some more cherries to try all this out on... :)

    Mal.

  5. #5
    m3m
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    Re: 1st Roast Help :)

    Ok, thanks for the helpful comments and link ....

    They do still have a shell, i just cracked one open and now i know what a green bean really looks like :) * I will grab some more from the tree on the weekend and give it a proper go this time :)


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    Re: 1st Roast Help :)

    Behmor Coffee Roaster
    Mark, dont forget to ferment the beans too, a link with simple instructions here: http://heartgarden.com.au/description.asp?id=189

    good luck with it

    Ian



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