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Thread: How long to de-gas?

  1. #1
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    How long to de-gas?

    Gene Cafe Coffee Roaster $850 - Free Beans Free Freight
    Any thoughts on how long you should let roasted beans degas before sealing in airtight container?

    I tend to leave overnight and then seal them away the next morning - is this long enough / too long?

    cheers... CTGTC :)

  2. #2
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    Re: How long to de-gas?

    Hi Simsy,

    Different beans degass varying volumes over various times. To compensate for this, many of us use one way valved bags (available from bean bay or other site sponsors). This allows for the gases to continually escape without compromising much in terms of oxidation. Many beans are best rested for 5 days or so (very hard to wait :)).

    Air tight containers may work but I found mine cracked under the pressure and everytime you open one, it fills with oxygen which you cant remove.

    hope that helps,

    sd

  3. #3
    Sleep is overrated Thundergod's Avatar
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    Re: How long to de-gas?

    Beans can take several days to degas a to the point where they dont blow up a plastic bag like a balloon.

    You should experiment to see what I mean.

    Put the roasted beans in a plastic bag and expel all the air then seal it and see what happens.

    After its blown up expel the gas and do it again.

    I recommend the use of one-way valved bags for storage.

  4. #4
    Senior Member Koffee_Kosmo's Avatar
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    Re: How long to de-gas?

    Hey simsy
    The way I read your question is that you want to know how long you leave fresh roasted beans before bagging. Is this right

    I bag my beans when they are cool
    I donít leave them overnight

    KK

  5. #5
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    Re: How long to de-gas?

    Before bagging them I usually leave them out a couple of hours.... but thats from laziness. No real scientific reason unfortunately. A few hours seems to work before sticking them in vavled bags and then impulse sealed.

  6. #6
    Sleep is overrated Thundergod's Avatar
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    Re: How long to de-gas?

    All my equipment is together so they are roasted, cooled, bagged and sealed without delay.

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    Re: How long to de-gas?

    Quote Originally Posted by Thundergod link=1225204345/0#5 date=1225247867
    All my equipment is together so they are roasted, cooled, bagged and sealed without delay.

    I keep telling my equipment to pull itself together ;P

  8. #8
    Super Moderator Javaphile's Avatar
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    Re: How long to de-gas?

    Ideally the beans should be sealed in one-way valve bags immediately upon cooling and reaching 90F. This prevents them from absorbing any moisture from the air.

    Roast em, cool em, bag em, squeeze em, seal em. :)


    Java "Roasting away" phile

  9. #9
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    Re: How long to de-gas?

    Definitely bag straight away.

    I just started roasting in Hong Kong 2 weeks ago, and I have been testing them everyday. (It is Autumn here now)

    I found that in Hong Kong under constant temperature (Air conditioned environment, non-stop) , and fairly constant humidity it took 10 days for it to settle down.

    Alot of Cafes in Australia will not use coffee that hasnt breathed for 4 weeks!!!!!!!
    (traditional Italian style??????)

    Whereas alot of boutique roasters will not use coffee over 1 week.

    I know a roaster who loves his coffee when its been out of the roaster for only a couple of hours.

    Taste is very subjective.....


  10. #10
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    Re: How long to de-gas?

    I know it takes a while. Ive vacuum packed some beans after 2 days and theyve still blown the bag up within a day. Im going to wait 3 days with my next batch.

    *8^)

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    Re: How long to de-gas?

    Quote Originally Posted by DavidS link=1225204345/0#9 date=1226403406
    I know it takes a while. Ive vacuum packed some beans after 2 days and theyve still blown the bag up within a day. Im going to wait 3 days with my next batch.

    *8^)
    Hi David and welcome to CS!

    Im not sure I understand why you intend waiting. Whats wrong with puffy bags?

  12. #12
    Senior Member Koffee_Kosmo's Avatar
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    Re: How long to de-gas?

    Quote Originally Posted by DavidS link=1225204345/0#9 date=1226403406
    I know it takes a while. Ive vacuum packed some beans after 2 days and theyve still blown the bag up within a day. Im going to wait 3 days with my next batch.

    *8^)
    David
    Are you packing your beans in the one way valve bags?
    The purpose of the valve is to let out built up gas

    KK

  13. #13
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    Re: How long to de-gas?

    My wife reckons this is going to blow beans all over her pantry.

    I reckon the sticky tape over the one way valve will blow.

    They have been in there since 1500 on the 11/11/08 anyone want to make a bet on when she blows.


  14. #14
    Senior Member Dennis's Avatar
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    Re: How long to de-gas?

    And what pray tell is the stick tape for?


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    Re: How long to de-gas?

    To see if I can make them explode.

  16. #16
    Sleep is overrated Thundergod's Avatar
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    Re: How long to de-gas?

    I agree the sticky tape is the week point.

    I have some 100g valveless bags which I put a small batch of decaf in a few weeks ago.

    I sealed them and forget to check on them for a week.
    The ziplock had popped andf they looked liked they wanted to explode but had gone as far as they could.
    The bag won.

  17. #17
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    Re: How long to de-gas?

    Thx TG I will tell my wife not to worry about the safety gogles before going in the pantry

  18. #18
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    Re: How long to de-gas?

    Quote Originally Posted by fishinglizard1972 link=1225204345/0#16 date=1226486286
    Thx TG I will tell my wife not to worry about the safety gogles before going in the pantry
    Quote Originally Posted by runfast link=1225204345/0#6 date=1225259205

    Quote Originally Posted by Thundergod link=1225204345/0#5 date=1225247867
    All my equipment is together so they are roasted, cooled, bagged and sealed without delay.

    I keep telling my equipment to pull itself together ;P
    Every time I eat beans my wife will not come any where near me... So the issue of Goggles and a small closed space and the subject of *pull *it all *together is something I just can not get out of my mind... *:-/

    Either way, let it out... and take stock of the situation... *I am sure that beans ant beans and every batch / type will have a different *response... *

    Some how it is nothing like my dads old ginger beer attempts... *One would blow and then the lot would take off... Glass every where... * :-/

    What can a few beans do? *Every one should move on and respect that things all age differently... Including ones self. Thus some trial and error and to ones own taste...

    It took me 3 goes to get the right wife :o and I am leaving it there ::)

  19. #19
    Sleep is overrated Thundergod's Avatar
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    Re: How long to de-gas?

    I also had a bag with a faulty valve recently.
    Youll probably find that what youve done is stopped/changed the aging/maturing a somewhat.
    On the 18th they wont taste the same as week old beans gassed normally.



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