Results 1 to 7 of 7

Thread: Yellow substance remaining in basket

  1. #1
    Member
    Join Date
    Jul 2011
    Posts
    44

    Yellow substance remaining in basket

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Hi snobs
    I often see a yellow substance remaining in the basket after I knock out the puck. What is it please?

  2. #2
    Site Sponsor
    Join Date
    May 2008
    Location
    Frenchs Forest NSW
    Posts
    766

    Re: Yellow substance remaining in basket

    coffee oil. Youll see more as your extraction gets tighter.

    charlie

  3. #3
    Member
    Join Date
    Jul 2011
    Posts
    44

    Re: Yellow substance remaining in basket

    Thanks for the reply, so this is normal?

    is it in any way an indication of. . .
    - grind too fine or coarse
    - pressure too high / low
    - temperature too high
    - over or underfilled basket
    - beans too old / young

    There are so many variables, Im just trying to better understand whats happening in the espresso process.

    Thanks again

  4. #4
    TC
    TC is offline
    .
    Join Date
    Oct 2004
    Location
    Melbourne
    Posts
    14,665

    Re: Yellow substance remaining in basket

    Its generally either too fine or an overdose. You might observe choking and bitterness assocoated with this shot.

  5. #5
    Member
    Join Date
    Jul 2011
    Posts
    44

    Re: Yellow substance remaining in basket

    OK, I suppose it was a little bitter, but I am a latte drinker normally and my cup is better than my local cafe already.

    anyway, I have gone 1 notch less fine on my Mazzer, keeping all other variables constant...
    Result, coffee is still way better than my local cafe (but still not as good as my favourite cafe). It pulled less pressure (now 10 Bar instead of 11) it may have been less bitter and there was no yellow residue. The 30 Ml shot was in 25 seconds.

    Cheers and thanks for the help.

  6. #6
    Senior Member
    Join Date
    Jul 2011
    Location
    Hobart
    Posts
    346

    Re: Yellow substance remaining in basket

    So... I upgraded from an Isomac Venus, which was great, to a Zaffiro... and now Iím uh a little underwhelmed... DOH!!

    Iím making a consistent shot... consistently dull!

    Like the OP Iíve also got coffee oil residue in the basket... and not just when Iíve overextracted/overdosed. Itís there when Iíve pulled 60ml (double basket) in 30 seconds and even, to a lesser extent, when Iíve pulled 60ml in 20 seconds.

    My current beans are a bit stale (a terrible admission) but theyíre the same beans I used to good effect in Venus when I decommissioned her a few weeks ago. Is an E61 group head machine likely to be less forgiving?

    Welcome thoughts on the problem and solution. Obviously the residue may provide a clue to the Ďdullnessí of my shots or it could be a red herring.

    Could it be... Machine too hot? Or pressure too high? These would require adjustments that I think are relatively simple if youíre a domestic mr_fixit. Iím really not much of a mr_fixit Ė should I take it into the experts (Cosmorex Coffee)? Coffee oil residue oxidising inside the Group? The machine is two years old and spent the last year in a box. Better spend some time looking behind the shower screen?

  7. #7
    Senior Member Barry O'Speedwagon's Avatar
    Join Date
    Dec 2011
    Location
    PRL
    Posts
    2,708

    Re: Yellow substance remaining in basket

    Behmor Brazen - $249 - Free Freight
    Quote Originally Posted by 72444B5177444B464C494C4A1415250 link=1327201835/5#5 date=1327973382
    My current beans are a bit stale (a terrible admission) but theyíre the same beans I used to good effect in Venus when I decommissioned her a few weeks ago. Is an E61 group head machine likely to be less forgiving?
    Might be an idea to try some fresh beans first (partic as the coffee apparently tastes crap)...this would eliminate one variable? I only get a touch of residue in the basked when Im dialling in / adjusting for ageing bean and have the grind too fine (and yes, it an E61 group head)...but seems more sensitive to this as beans age.




Similar Threads

  1. Brazil Yellow Bourbon/Monsooned Malabar
    By itsme5k in forum Blending Room
    Replies: 1
    Last Post: 23rd October 2007, 02:49 PM
  2. Brazilian Yellow Bourbon
    By TimA in forum General Coffee Related...
    Replies: 2
    Last Post: 9th June 2005, 12:14 AM
  3. Brazil Yellow Bourbon 1st impressions....
    By TC in forum Cup Tasting Room
    Replies: 1
    Last Post: 16th December 2004, 01:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •