Using gelatin: step-by-step (i.e., "take two")

Discussion in 'Homebrewing' started by GeeL, Dec 1, 2012.

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  1. GeeL

    GeeL Initiate (0) Aug 27, 2008 Massachusetts

    Some of you may recall a post I did a couple weeks ago about my attempt at using gelatin as a fining. The gelatin just floated at the surface of one beer (it's slightly higher gravity, not sure if that's the issue), and in the other beer the gelatin is settling a little at a time (every couple pints come out nasty before the beer runs clearer, but not clear).

    I brewed a beer for an event next Sat (that is, one week from today). I don't have time for the gelatin to settle over the course of a couple weeks. I need this done in a week. Or, I just won't use the gelatin, will filter, and let the beer be a little cloudy.

    Because I like practicing and perfecting brewing techniques, and because I write task analyses for a living, I wrote step by step instructions. Please review these and let me know if I have this right. Thanks.

    I saw some people had pre-combined the gelatin with room temp water, let it sit, then heated it. The directions on the box say add the gelatin to hot water. So that's procedure I used. Unlike last time, I will not add gelatin to boiling water.

    Keg cold (30 deg or so) beer.
    Heat 2/3 cup (6oz) water to 170 deg.
    Add 1/2 tsp gelatin and stir until combined.
    Allow to cool to about 100 deg.
    Pour gelatin mixture into keg and onto the cold beer. It doesn’t have to be gentle, but don’t splash it around too much.*
    Do not stir.
    Re-cap the keg.
    Connect the CO2 line.
    Turn up pressure on CO2 to carbonate beer.**
    Purge out air.
    Return to fridge, trying not to let it splash around inside, and let sit for a week.
    Drain off a quart or so.
    Enjoy.


    *When pouring the gelatin into the keg, it’s ok if the gelatin isn’t all the way to the edge of the keg, as it expands/solidifies, it will cover the entire surface.

    **I tend to force carbonate at 20+PSI, would this be an issue?
     
  2. nozferatu46

    nozferatu46 Initiate (0) Mar 24, 2008 Indiana

    I've always had good results of adding my gelatin/water mixture hot. I know some people have this killed yeast worry, but the 1/4 cup of hot water isn't going to bring 5 gallons of beer to a temp high enough to kill all the yeast. I still bottle condition (this years tax return is for a kegarator), and have never had an issue with beer carbonating.
     
  3. pweis909

    pweis909 Grand Pooh-Bah (3,250) Aug 13, 2005 Wisconsin
    Pooh-Bah

    I used gelatin infrequently, back when I bottle conditioned all my home brews. I only used it when I felt there was undesired haziness or tannic astringency to the beer that I wanted to pull out. I wasn't concerned about killing the yeast with 1/4 of hot water, but I was a little concerned that the gelatin would pull some yeast cells out of the beer and prolong bottle conditioning. My guess is this is probably true only to some nominal extent. Nevertheless, I would stir in a ~1/4 tsp of dry yeast with my priming sugar at bottling. Probably was unnecessary.

    @GeeL I think your write up looks good with regards to gelatin prep and addition. Not sure about the force carbonation, as I have always added gelatin to the fermenter. I wonder if carbonation affects the settling time of gelatin or the interaction of proteins in the the gelatin with proteins and tannins in the beer. Carbonation will drop the pH some and protein chemistry usually shows some pH dependency, but I'm guessing that whatever the effect is turns out to be small potatoes.
     
  4. geezerpk

    geezerpk Initiate (0) Nov 8, 2010 South Carolina

    Stir package of gelatin into room temperature water. Let "bloom" for 15 minutes. Heat mixture to around 170-180 degrees. Let cool slightly if paranoid about killing yeast. Stir into fermented beer in primary or secondary. Let it do its thing for 2 or 3 days. If you're able to chill below 40 degrees for a day it will speed the clearing greatly.
     
  5. michaeltrego

    michaeltrego Crusader (447) May 21, 2004 New Hampshire

    I boil 8 oz. water, then chill to 150. Sprinkle 1/2 tsp. gelatin on surface and let bloom for 15 min. Stir with sanitized spoon to mix. Let it settle for a few minutes and repeat stirring. Gently pour onto surface of cold beer in keg. Seal and purge. Gently swirl keg to mix. Carbonate as usual. After a few days pour off a pint of murky brew. After another few days pour off a pint of almost clear brew. After another few days enjoy crystal clear brew.
     
  6. DNuggs

    DNuggs Initiate (0) Apr 13, 2006 Massachusetts

    This is more or less the way I do it. Let it sit in a 1/2 cup of 70-80 degree water for 20 minutes, stick in the microwave and set the timer for a minute. Keep an eye on it in the microwave and when it looks "clear" take it out (the full minute isn't always necessary). Let cool slightly and pour into my already chilled keg.
     
  7. mikehartigan

    mikehartigan Maven (1,421) Apr 9, 2007 Illinois

    I stir 1 tsp into 2/3 cup room temp water, warm it to 170 in the microwave, stir it up a bit to dissolve, then dump it hot into my chilled, carbonated keg - no shaking or stirring necessary. Purge and wait two days. Pour off a half pint or so of sludge, then read the newspaper through your glass of crystal clear beer. It truly works like magic! I'm not sure what happens if you jostle the keg after that.
     
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  8. CASK1

    CASK1 Pundit (951) Jan 7, 2010 Florida

    I add 1 tsp gelatin to 2/3 cup room temp. water at let bloom for 15 minutes. Heat for 45 seconds or so, stir and let sit to cool slightly. I then pour this into an empty keg and rack the beer onto the gelatin. Purge, chill and carbonate over a week. 1 pint or so of sludge, then clear beer!
     
  9. GeeL

    GeeL Initiate (0) Aug 27, 2008 Massachusetts

    Thanks! Not everyone gave a gelatin measurement, but I can compare and take the avg. It looks like there's some leeway with that. Gonna try it now.
     
  10. GreenKrusty101

    GreenKrusty101 Initiate (0) Dec 4, 2008 Nevada

    A lot of things/concentrations/temps will work...just don't boil it.
     
  11. JimmyTango

    JimmyTango Initiate (0) Aug 1, 2011 California

    I boiled it this Friday and added to a beautiful XPA.


    Then dumped the whole goddamn bucket on Sunday 'cuz of burnt bacon taste.


    Somebody shoot me.
     
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