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Thread: Different fresh beans, bad looking extraction

  1. #1
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    Different fresh beans, bad looking extraction

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hey guys, so I've bought a 200g bag of Ethiopian yirgacheffe from a local Cafe/roaster in my hood which I only bought from because it was the only place open and I was out of beans.

    The basket gets covered in the initial extraction to show a level pour (naked group handle in use) but right after when it's starting to pour, it will have a few holes in the extraction where it won't form a complete extraction. Basket holes are clear, and shower screen is clean. And it wasn't over or under dosed

    Grinder is a few months old and hasn't given a bad pour until these beans, so it's not to blame (and the burrs have been cleaned the other week). I purged a good 10 or so grams to make sure but still happened.

    They were roasted 5 days ago so they're not stale, they seem to be a light roast I assume as the beans and the grounds are a lighter Brown. The espresso tasted good, I wasn't disappointed with it, but just didn't get why the extraction looked awful. Is this caused by some odd beans?


    These are the beans if the size and color inconsistency has anything to do with it.

    Last edited by kyeba; 27th October 2015 at 11:46 PM.

  2. #2
    Senior Member flynnaus's Avatar
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    These beans are very lightly roasted for manual brewing methods. I'm surprised your espresso brew didn't taste sour, especially with wormholes appearing.

    A bit of a waste brewing these as espresso in my opinion. If you only have the option of a espresso machine, you could go out and buy another bag of single origin beans roasted for espresso and mix these to your taste. Next time you get have to buy local for your espresso, it's safer to stick to the blend roasted for espresso

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    I've got manual brew options at home, which I'll put the rest of these aside for. I was able to get some single origin down the road this morning thankfully.

    I was running the temp at 94c if that's why I avoided any sourness.

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    Senior Member coffeechris's Avatar
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    Its only an opinion and a thought but I feel beans that are roasted this light will give you uneven extractions. One extraction might be good the next one could be bad. The first thing i see and somewhat dont see from your picture is that on the beans there is still some chaff. I personally found in the past when I have tried roasting this light (which was a years ago and i dont anymore) most beans will still have a high amount of chaff around them. Being in a home environment I never took the extra steps to removing the excess chaff before grinding and extraction. I personally found the more evidence of chaff in the portafilter meant an uneven extraction. Weather or not the chaff acts as a channeling avenue for water i dont know.

    But found it wasnt so much the bean which would cause the uneven extraction but more the roast level i took it too..

    This is only an thought of my own, happy to hear some rebuttal.

    Cheers,

    Chris

  5. #5
    Mal Dimal's Avatar
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    I've never roasted coffee this light for any of the manual brewing options we have here at home....
    To be honest, these really appear quite odd to me and seems like there is more going on than just a light roast...

    Mal.

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    Agreed Dimal.

    Is Yirgacheffe coffee usually so uneven in size?

  7. #7
    Senior Member Barry O'Speedwagon's Avatar
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    Some of them look like peaberries. I don't recall seeing variation in size like that in any of the Yirgs I've roasted....they can certainly be a bit mottly, but that sample of beans looks v. strange (and likely not finished first crack in some cases).

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    Quote Originally Posted by MrJack View Post
    Agreed Dimal.

    Is Yirgacheffe coffee usually so uneven in size?
    Interesting you asked this. Just opened a gift bag of Beloya beans which appear nothing like others I have had.
    Hmmmm...

  9. #9
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    We're roasting Beloya naturals tomorrow and they look one hell of a lot better than that- green and out of the roaster.
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    Quote Originally Posted by Talk_Coffee View Post
    We're roasting Beloya naturals tomorrow and they look one hell of a lot better than that- green and out of the roaster.
    Taking into account monitor diferences, my beans are not even remotely the colour of your ad. Really they are the lightest I have seen for ages. The coffee from the Bonavita has been alright, just.

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    Quote Originally Posted by Barry O'Speedwagon View Post
    I don't recall seeing variation in size like that in any of the Yirgs I've roasted
    It was the first thing I noticed when I put them in the hopper and thought it was a strange sight considering it wasn't a blend.

    I guess I'll have to not put myself in the position of running out of beans again, because I'd like to avoid giving that place my money....even though everyone flocks there raving about the coffee.

  12. #12
    TC
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    Rough and ready mobile pic in average light- but ours looks like this
    IMG_3603.jpg
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    Good Grief! The ROAST beans I got are that colour.

  14. #14
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    Quote Originally Posted by GreenBeanGenii View Post
    Good Grief! The ROAST beans I got are that colour.
    ...in which case, they're roasted to a similar colour as ours are

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    Mal Dimal's Avatar
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    Quote Originally Posted by Talk_Coffee View Post
    Rough and ready mobile pic in average light- but ours looks like this
    IMG_3603.jpg
    Ah, that's better - By a long, long way....

    Mal.
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  16. #16
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    Thanks Mal. They are amazing. We roasted them to circa 2 deg prior to 2nd. #1 filter coffee of the year for me... Creamy, Strawberries, stone fruit. No lemons! Wow!

    Can't wait to run this batch through the espresso machine.
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  17. #17
    Mal Dimal's Avatar
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    My mouth's watering mate....

    Stop it!

    Mal.
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  18. #18
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    I just ground the rest of those dodgy beans in my porlex hand grinder to season my machine after a chem flush, and they felt like I was trying to grind rocks :0

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    Just a quick question, have been buying my beans from well known a roaster in Brisbane for the last 7 years. The quality has nearly always been great. Purchased some last weekend and after looking at them when I got home noticed there was a very large difference in size between the beans. It is the first time that I have noticed this although I do look at them each time I buy. Also noticed there seemed to be a more bitter taste in the coffee.
    Does having smaller beans mixed in with larger ones effect the roasting consistency? Thanks for your help in advance.

  20. #20
    Senior Member Yelta's Avatar
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    Quote Originally Posted by Fard View Post
    Does having smaller beans mixed in with larger ones effect the roasting consistency? Thanks for your help in advance.
    G'Day Fard,

    Yep, it can certainly make a difference, however most experienced roasters are able to adjust roast times and temp to handle the difference.

    Re the beans you bought last weekend, why not discuss it with the people you purchased them from, perhaps there is a problem they are not aware of.

  21. #21
    Senior Member saroadie's Avatar
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    Quote Originally Posted by Fard View Post
    Does having smaller beans mixed in with larger ones effect the roasting consistency? Thanks for your help in advance.
    Depends if the smaller and larger beans were roasted together, or separately and then blended.

    Is the coffee a single origin or a blend? A blend may contain beans of differing size or even shape if Robusta beans are a part of the blend.

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    Behmor Brazen - $249 - Free Freight
    Thanks for the info saroadie and Yelta, the beans are a blend. The roaster has been bought out by a major group and was think that they may be buying some cheaper beans to keep the costs down. I will speak to them this weekend when I go back to purchase my next lot of beans.



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