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Thread: THE ULTIMATE cold brew / cold drip thread

  1. #101
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    Yeah gonzo,I know what you are saying; my shifts are all over the joint.

    Thank the holy of holies that coffee was a gift bestowed upon us; for us to partake.

    Especially this cold brew which his Holiness Java "I told you so" Phile has for decades been trying to convince us.

    I am indulging in self flagellation for not listening before now.

  2. #102
    Senior Member gonzo89's Avatar
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    His holiness Java sure impressed me when I heard of his 4 decades of cold brewing.. That is serious stuff!

    I only discovered it last year and have been loving it ever since.

    This heatwave over Brisbane has me considering an iced pour over for some extra fragrance. Bring on 42 tomorrow (or please don't)
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  3. #103
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    You don't need a heatwave fire iced brew. I drink it that way every day for my afternoon coffee at work. Even mid winter in Melb
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  4. #104
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    Quote Originally Posted by Pauly404 View Post
    You don't need a heatwave fire iced brew. I drink it that way every day for my afternoon coffee at work. Even mid winter in Melb
    Yeah I totally agree I love to enjoy my coffee through various methods in one day. The heat just added an excuse to the list to convince me to make a delicious iced brew. It did end up hitting 42 unfortunately but I was prepared.

  5. #105
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    ImageUploadedByCoffeeSnobs1416188446.928756.jpg

    My medically inspired cold drip setup.

    The intravenous line roller clamp makes fine adjustment to the drip rate super simple due to the fact that that each ml of fluid 'contains' 20 drips.

    Sean.
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  6. #106
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    Quote Originally Posted by STS View Post
    My medically inspired cold drip setup.
    That's awesome! What a great idea.
    And if you worked at a desk and didn't have to move too far, you could have another one out of the collection jar and run an IV line straight out other end!
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  7. #107
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    Quote Originally Posted by STS View Post
    ImageUploadedByCoffeeSnobs1416188446.928756.jpg

    My medically inspired cold drip setup.

    The intravenous line roller clamp makes fine adjustment to the drip rate super simple due to the fact that that each ml of fluid 'contains' 20 drips.

    Sean.
    I love it,so many ideas and ways to make this delicious stuff.
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  8. #108
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    So here's a question - when you talk about pre-wetting the grounds, what's the technique for that?
    Did a ghetto aeropress brew last night, but almost over flowed the canister with 50g coffee (partly drip speed I guess) but I can see that starting with the grounds wet could help to keep things moving rather than backing up?

  9. #109
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    Pre-wetting. Soak the grounds and mix then with a chopstick. You need all of the grounds to be wet.

  10. #110
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    Also, seems like your grind is too fine. If the water won't get through you need a courser grind.

  11. #111
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    Quote Originally Posted by DesigningByCoffee View Post
    So here's a question - when you talk about pre-wetting the grounds, what's the technique for that?
    Did a ghetto aeropress brew last night, but almost over flowed the canister with 50g coffee (partly drip speed I guess) but I can see that starting with the grounds wet could help to keep things moving rather than backing up?
    There is a thread about using the AP for cold drip, which inspired me to give it a try. I have since done 100s of batches that I have given away or sold.

    50g of coffee is the practical limit, I use the irrigation drippier, which has quite a large drip, so 1 drip about 2 seconds. Traditional french press type grind of a filter roast. 500ml of water in the drip bottle.

    Yields something that can be had straight but is better when diluted 70/30, coffee / water.

    Heres that thread home made cold drip

    Are you using a metal filter?

    I use the able metal disk in the bottom and a paper filter on top for even water distribution. Tried the paper filter in bottom a few times and it was just to slow and / or would clog up.

    Edit: oh yeah and if you want to do the pre wetting thing, I experimented with this for a while using a SS bowl, silicon spatula and a hand held water sprayer on mist. Spray and fold.
    It works well if you want to use a slightly finer grind and eliminate the big " back up "

  12. #112
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    Thanks both.
    Started with the able disc, but panicked and swapped out to the paper filter on it's own. Th water gets through OK so I'm not too worried about the grind, but it just doesn't wet to the bottom fast enough so fills up the top. So more likely my drip speed. Might try the wetting/stirring idea, or see to slowing down the drip. I'll look for an irrigation dripper - my plastic bag started with a drip every second or so - so a bit fast IMHO.

    Or just go back to the big bottle!

    Haven't tasted the resulting brew - but looked and smelled great last night!

  13. #113
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    Hi Matt.

    My routine involves using a grind similar to what I would use in my Chemex. Probably about castor sugar size.

    I've found with this size grind about 80gm coffee is spot on. After I put the grinds in the Aeropress (I tried SS disk on bottom but prefer paper) I drizzle cold water over grinds using a pour over kettle.

    Usually takes about 5 min and 140 ml to fully wet grinds to the point of an occasional drip through the bottom. I also will gently tap the side of the aeropress as I find this assists in dispersing the water through the coffee.

    I then put rinsed paper filter on top of grinds to evenly disperse drips and off we go.

    I use a ratio of 1:10 coffee:water- predominantly ice (600 ml) with a little water (60 ml) plus the pre soak water (140 ml).

    Prior to using the IV line which makes controlling the drip very simple, I found that using such a large volume of ice kept the drip rate slow enough to avoid water collecting on top of the grinds.

    Sean

  14. #114
    Life-long Learner DesigningByCoffee's Avatar
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    Thanks Sean
    Picked up a dripper last night from Bunnings, so that should help with slowing the drips down – but will also have a look at ways to wet down the grounds before getting into it
    Had a cup of the last brew last night, straight up. Very nice! I think it ran a little fast brew wise with my faster drips, so I'm sure the slower brew will help with body & depth.

  15. #115
    mds
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    I could have missed it, which dripper do I need

  16. #116
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    I just picked up one of these loose - about 70c or so

    Pope Veriflow Dripper - 10 Pack I/N 3120442 | Bunnings Warehouse

    Drilled a hole in my juice bottle cap slightly undersize and pushed then it through. The inner cap seal popped out un-harmed when I drilled through the cap, so I just used the sharp point of the dripper to push through that, which sealed and located it perfectly when I put it back in place, without glue.
    Will try get a pic loaded at some stage…

    Cheers Matt

  17. #117
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    Great

    I've just finished installing some droppers and I have a few spare.

    What's this about "inner cap seal" and " drill through the dropper"?

    Thanks

    Mel (some people call me Matt

  18. #118
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    Hi Mel
    Inside the juice lid I used, there is a little plastic, rubbery 'gasket' that seals the cap from leaking. This is not glued in, so when I drilled through it just popped out. Rather than try seal it again another way, I just pushed it back on - and it seals well, and hold the dripper in place into the bargain!

    Here's a couple of pics of the top cap with dripper and bottom cap with filter paper…

    DBC-Drip-Caps-1.jpg DBC-Drip-Caps-2.jpg DBC-Drip-Caps-3.jpg

    Cheers Matt
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  19. #119
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    Looks good Matt. Looking forward to seeing pics of the finished device and any differences you notice in the cup between this and previous models.

    Sean

  20. #120
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    Got another batch on as we speak - much more even and steady drip - just a little bit hard to get right, as the adjustment is a bit coarse…

  21. #121
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    Hi Matt

    It looks good and so simple. Does that dripped drip slow enough? Look forward to seeing the whole setup.

    Thanks
    Mel

  22. #122
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    This is such great stuff, when in Bunning's the other day I was reading specs (as one does) and the irrigation drippers had specs of 2litres per hour and 4 litres per hour, so I moved on. But,

    if these things work for what we need, let us share the ideas.

    I have 2.5 litres of drip happening at the moment because my woman has become an absolute cold drip coffee beast. Well I am too, but I now have to make twice as much.

    She has put the aeropress that I just bought for her aside and just waits for more cold drip. What have I done!!!!!!!!!!!!!!

  23. #123
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    Quote Originally Posted by Ravenscroft View Post
    This is such great stuff, when in Bunning's the other day I was reading specs (as one does) and the irrigation drippers had specs of 2litres per hour and 4 litres per hour, so I moved on.
    Need to remember that that would most likely be the non-adjustable ones, and under mains pressure

    My adjustable dripper is currently giving about a drop a second…



    And this is my setup Mel

    Attachment 8000

  24. #124
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    Tell me more, as I am severely interested.

    My honey nozzle works well but you know how it is (perhaps).

    I am trying to find the ultimate Ghetto nozzle as I am sure that it exists.

    I bought a fish tank nozzle thing the other day.

    But at the pet shop the kittens just blew me away with their cuteness and I lost all meaning for even being there.

  25. #125
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    Looks beautifully simplistic Matt! Do you use a filter in your device? Difficult to see from picture.

    Sean

  26. #126
    mds
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    I'm impressed

    Well done Matt

    Mel

  27. #127
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    Quote Originally Posted by STS View Post
    Looks beautifully simplistic Matt! Do you use a filter in your device? Difficult to see from picture.

    Sean
    Hi Sean
    If you see the pics in #118, you'll see I've got an aeropress filter in one cap (for the bottom bottle) which keep the coffee in. The top one has the dripper. I also put a filter onto of the grounds to disperse the water evenly over the coffee.

    The irrigation dripper is OK - but a little inconsistent. Had to check a few times last night as it kept stopping early on, but got there in the end!

    But the honey/sauce bottle nozzle has potential

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    Last edited by Javaphile; 20th November 2014 at 02:39 PM. Reason: Fix link(s)

  29. #129
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    The Honey one I use has the small size cap that will screw on to drink bottles, like Coke etc. I put an o-ring on the bottle to stop the minuscule seep that I was getting.

    but I still get a drip from the adjustment screw bit, but only one every 8 seconds.

    It works really well so far (about 3 sessions).

  30. #130
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    Hi Matt
    This morning I had a cold brew using, the immersion method, at my local at it was more to my taste, like drinking a lovely cold coffee.

    I've tried cold drip before and it didn't taste like coffee, it was light almost like tea, and I thought it was some other drink and certainly not the cold coffees I used to drink in Italy.

    So after all your advice I'm going down the immersion path.

    I was just connecting a few more drippers and found 2 slow dripper, Funny.

    At least now I know how to make a cold drip.

    Thanks

    Mel

  31. #131
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    Hi Mel
    I'm still playing (hey, a bloke needs a hobby!) but I agree. My first immersion batch was a cracker, and I haven't matched it yet with this drip. The latest one was not as good as the one before – there are a lot of variables using this method.
    Whereas cold steep - measure, drop into water - leave in the fridge! Be back there myself soon I think

  32. #132
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    I'm interested in what others experiences are with using beans of varying roast level. I generally use beans taken to about 1:50-2:00 min beyond rolling FC. This is generally because this is my normal roast for everyday drinking.

    Does anyone feel there is any merit to doing a specific roast for cold drip/immersion; and if so what?

    Sean

  33. #133
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    I'm possibly making a cold drip set up. Perhaps ghetto, perhaps home made.

    I'm making the water chamber 1100mL, and at 2:1 will require 500g of coffee.

    I plan on using aeropress filters. (64mm dia)

    Problem is I don't have 500g of ground coffee right now.

    I need to know how big to make the grounds chamber in order to accommodate 500g of ground coffee. Any suggestions?

  34. #134
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    To me that sounds like a real lot of coffee to the amount of water. I do closer to 1 coffee to 10 water, well a little bit more coffee. You would need a big grounds holder.

    I did one with about 300gm in the fat container in one of my pics earlier and the grounds do swell up quite a bit.

    One another note I bought a cheap plastic drip nozzle from Bunnings in the irrigation section. It is called a veri flow by Pope and is adjustable. 75 cents. I am testing it now and it seems to work.

    I drilled a 3mm hole in the cap of a Coke bottle and forced the barbed pin in. Just another option and something to play with.

  35. #135
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    I'm just going to make do with a aeropress size grounds holder.

    I don't like the idea of a plastic dripper, so am making one from brass. Pics if it works!

  36. #136
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    Quote Originally Posted by thegoner View Post
    I don't like the idea of a plastic dripper, so am making one from brass. Pics if it works!
    Before you try making something you may find one of these needle valve drippers in your local home brew shop useful as an alternative. Not particularly expensive. I've attached this one to a bottle cap.

    GrahamK
    Attached Images Attached Images

  37. #137
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    Quote Originally Posted by GrahamK View Post
    Before you try making something you may find one of these needle valve drippers in your local home brew shop useful as an alternative. Not particularly expensive. I've attached this one to a bottle cap.

    GrahamK
    Cool, i might upgrade from the irrigation dripper!

  38. #138
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    Yeah, the irrigation dripper that I talked about earlier didn't hold up. It slowed down,The Honey thing worked much better.

    Just watch the lead content of the Brass as you could end up quite mad, as if we were not mad to start with

  39. #139
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    I tried a garden style dripper as well a year or so ago. I think you'll find they all need adjustment due to changing water volume and temperature, but the garden dripper was a real pain to keep adjusting. The needle valve is much easier to adjust.

    GrahamK

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    OK,got to find a brew shop.

  41. #141
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    Quote Originally Posted by Ravenscroft View Post

    Just watch the lead content of the Brass as you could end up quite mad, as if we were not mad to start with
    I think the brass content is fine. Have you been avoiding brass taps?

  42. #142
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    Quote Originally Posted by thegoner View Post
    I think the brass content is fine. Have you been avoiding brass taps?
    No, I was sort of just joking but that bit seems hard to put across in a forum situation.

    You know, lead (Pb) and sexual deviation that was supposedly the downfall of the Roman Empire

    I am just playing with stuff at the moment and am definitely NOT trying to preach.

    Hey , I am just a beginner and sharing stuff that I find interesting to consider.

    Just playing with coffee, which I love.

    RC

  43. #143
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    Ok, ok, got me with the brass comment.

    Here's some photos of the valve made on the weekend. More to come over the months. At the moment I'm just going for a ghetto set up, using aeropress for the grounds container. Something nice later (brass/copper) for the water container.

    At the moment, using the coke bottle, I will need to re adjust the drip rate as the water level goes down. I'm hoping my next water container will be large in diameter, to reduce the height change/pressure differences of the water over the brew time.











    Last edited by thegoner; 24th November 2014 at 04:20 PM.
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  44. #144
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    Just brewed some light roasted Yirg and it is amazing

  45. #145
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  46. #146
    Life-long Learner DesigningByCoffee's Avatar
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    Quote Originally Posted by thegoner View Post
    Here's some photos of the valve made on the weekend.
    That's a cool valve - you made it? Or was that a home-brew jobbie?

    Here are two recent attempts. First was a green-bean bag immersion method (which worked but the bag soaked up most of the water!) and tasted good…

    dbc-cold-brewing-1.jpg dbc-cold-brewing-2.jpg

    The second is another drip brew. I'm actually starting to appreciate these more - but I think they taste better after a couple of days. Pretty light straight up, but gain intensity as it ferments a bit
    This set up has a few mods to give a bit more room above the coffee for bigger bacthes. And I used the little watering can attachment to wet the grounds before I set it dripping. Next time I might even drop the ground in 50g at a time and wet each layer.

    But this is 150g coffee, 1.5L water plus the pre-wetting. We'll see how much I get out!

    dbc-cold-brewing-4.jpg

  47. #147
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    Quote Originally Posted by Pauly404 View Post
    Just brewed some light roasted Yirg and it is amazing
    That must have been light looking at the colour! How far did you roast it?

  48. #148
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    Quote Originally Posted by DesigningByCoffee View Post
    you made it? Or was that a home-brew jobbie?
    I made it on the lathe on the weekend. It took a fair bit of effort and beer to make.

    The post about the home brew valve was about 3 hours to late!

    (for those that don't know what it looked like at the start, here's a pic of some round bar stock.


    )

    It offers a fair amount of control over drip flow. Have to get home to try it out on some coffee.
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  49. #149
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    Wow these inventions are great.

    I did a cold drip and a cold steep with same amounts of water and same coffee for comparison and for my taste I prefered the drip by far, it tasted much cleaner.

    I did side by side taste tests over about 3 days. I am going to toss the rest of the steep. I strained the steep twice, once rough then through the aeropress with a metal disc.

    So it is drip for me from now on. Personal preference and all that.

  50. #150
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    Behmor Brazen - $249 - Free Freight
    Quote Originally Posted by Ravenscroft View Post
    Wow these inventions are great.

    I did a cold drip and a cold steep with same amounts of water and same coffee for comparison and for my taste I prefered the drip by far, it tasted much cleaner.

    I did side by side taste tests over about 3 days. I am going to toss the rest of the steep. I strained the steep twice, once rough then through the aeropress with a metal disc.

    So it is drip for me from now on. Personal preference and all that.
    Yeah, very much so
    But don't chuck the steep just yet! I reckon it is better for Iced Coffees - the cold drip tastes a little odd with milk in this usage IMHO. But I'm certainly coming around on the drip for "black with ice" usage!

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