BIABrewer.info

Great to see a post from stux - it's been way too long .

Just wanted to say hi to Stu but in this thread, I suspect I'll have to post some figures as well so have dug up some very old ones.

All these were taken with a refractometer but have converted them.

20 mins = 1.025
26 mins = 1.032
36 mins = 1.034
46 mins = 1.035
56 mins = 1.037
66 mins = 1.037

Start to rise to mash out temp...

76 mins = 1.039
96 mins = 1.040

No idea why I did a 20 minute mash-out. As I said, these are very old figures .

end of 90 minute mash: 1.0432/11.2 brix
end of 15 minute mashout: 1.044/11.4 brix

Many thanks again for your contributions. Your numbers have now been collated into a spreadsheet and we can already see that mash time certainly makes a difference that is worth quantifying.

It is also more obvious now as to what figures we need from you. If you are brewing over the New Year period and have time, could you please take a few extra measurements for us?

[Please copy, paste and complete the relevant parts below into a post. Record your measurements in any units you like as long as they are clear.]

I did a full-volume mash for 60 minutes.

1. At 20 minutes, my gravity reading was...
2. At 40 minutes, my gravity reading was...
3. At 60 minutes, my gravity reading was...

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was...
2. At 60 minutes, my gravity reading was...
3. At 90 minutes, my gravity reading was...

Quick Bonus Questions

A. The weight of my grain bill was...
B. The volume of water I mashed with was...
C. My average mash temperature was...

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)...
2. At the start of mash-out, my gravity reading was...

It is not right or wrong to leave a BIAB mash at mash-out temps for any period of time. If, however you did leave the mash at mash-out temps, can you also please answer the following?

A. After reaching mash-out temp, before pulling the bag, I waited (mins)...
B. After I pulled the bag my gravity reading was...

Thanks in advance.

A very real difference to the entire all-grain community can be made by BIAB brewers who contribute here. Pure BIAB (full-volume brewing) has created research opportunities such as the above that would hitherto been impossible.

We hope you find contributing your figures here engaging and interesting. Logistically, it is not easy to take multiple measurements on a single brew. Whether you are an experienced all-grain brewer or a new one, contributing to a thread like this does take your time. We really value that, hope you learn something from going through the exercise and, most importantly, realise that you are a pioneer in creating data that will be of value to every all-grainer in the future.

Thanks in advance,
BIABrewer

I wanted to do a did a full-volume mash for 90 minutes but only did a 60 min mash .

1. At 30 minutes, my gravity reading was 1.036
2. At 60 minutes, my gravity reading was 1.036

Quick Bonus Questions

A. The weight of my grain bill was 5171g
B. The volume of water I mashed with was TWN: 37.56
C. My average mash temperature was 65C

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 16 mins
2. At the start of mash-out, my gravity reading was 1.036

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 5 mins
B. After I pulled the bag my gravity reading was 1.043
C. EOBG 1.054

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was 1.019
2. At 60 minutes, my gravity reading was 1.019
3. At 60 minutes, my gravity reading was 1.026

Quick Bonus Questions

A. The weight of my grain bill was 3845g
B. The volume of water I mashed with was TWN: 34.43
C. My average mash temperature was 64C

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 14 mins
2. At the start of mash-out, my gravity reading was 1.026

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 5 mins
B. After I pulled the bag my gravity reading was 1.034
C. EOBG 1.048

2 brews for the day. Start 10:00 finish 20:03. I've read somewhere that that one of the drawbacks of BIAB is that you can't do two brews in one day. Well sir, wherever you are, here's two fingers for you.

And this is probably the end of the 2012 brew season... 25 Brews. BIAB - the most fun a person can have with a pot and a bag..

Good going Bertie,



Miss read that..thought that you said "most fun a person can have with a bag of pot "

Have a good un

Yeasty

One day I'll tell you a story regarding two university lads on a tour through Zimbabwe on Yamaha 550XT bikes and an (un)fortunate (first and last) encounter with Malawi Gold.

90 minute mash; forgot to take 30 & 60 minute readings though

Quick Bonus Questions

A. The weight of my grain bill was 5500g
B. The volume of water I mashed with was TWN: 36.37
C. My average mash temperature was 67.5C

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 78C - 15 mins
2. At the start of mash-out, my gravity reading was 11.4 Brix/1.0459

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 10 mins
B. After I pulled the bag my gravity reading was 12.0 Brix/1.0484
C. EOBG 13.0 Brix/1.0526

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was...N/A
2. At 60 minutes, my gravity reading was...N/a
3. At 90 minutes, my gravity reading was...1.024

Quick Bonus Questions

A. The weight of my grain bill was...3163gr 6.97 Pounds
B. The volume of water I mashed with was...TWN 34.71L 9.17Gal
C. My average mash temperature was...65C 150F

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)...10
2. At the start of mash-out, my gravity reading was...1.024

It is not right or wrong to leave a BIAB mash at mash-out temps for any period of time. If, however you did leave the mash at mash-out temps, can you also please answer the following?

A. After reaching mash-out temp, before pulling the bag, I waited (mins)...10
B. After I pulled the bag my gravity reading was...1.026

I did a full-volume mash for 90 minutes.

1. n/a
2. n/a
3. At 90 minutes, my gravity reading was 15.6 brix / 1.061

Quick Bonus Questions

A. The weight of my grain bill was 15.5 lb (7.03 kg)
B. The volume of water I mashed with was 8.6 gal (32.55 L)
C. My average mash temperature was 152 F (66.7 C)

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took 5 mins
2. At the start of mash-out, my gravity reading was 15.6 / 1.061

It is not right or wrong to leave a BIAB mash at mash-out temps for any period of time. If, however you did leave the mash at mash-out temps, can you also please answer the following?

A. After reaching mash-out temp, before pulling the bag, I waited 10 mins
B. After I pulled the bag my gravity reading was 16 brix / 1.063

I did a MAXI with 2.5 gallon water held back from mash,
this water was added before the boil.
I planned for a 60 minute mash, but didn't hit my
gravity, so I went for a 90 minute mash.

I hope this info helps..............

1. At 20 minutes, my gravity reading was... 12 brix/1.048
2. At 40 minutes, my gravity reading was... 13 brix/1.053
3. At 60 minutes, my gravity reading was... 14 brix/1.057
4. At 90 minutes, my gravity reading was... 14.4 brix/1.059

Quick Bonus Questions

A. The weight of my grain bill was... 24.5 lbs.
B. The volume of water I mashed with was... 11.67 Gal
C. My average mash temperature was... 150 F

If you did a Mash-Out (and only if you have time.)

After mashing, I did a rest at 158 F, taking 25 mins

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)... 18 mins at 175 F
2. At the start of mash-out, my gravity reading was... N/A

It is not right or wrong to leave a BIAB mash at mash-out temps for any period of time. If, however you did leave the mash at mash-out temps, can you also please answer the following?

A. After reaching mash-out temp, before pulling the bag, I waited (mins)... 15 mins
B. After I pulled the bag my gravity reading was... 15.4 brix/1.063 (hitting my PLG }

Brew 1 - American Amber Ale
I did a full-volume mash for 90 minutes.
1. At 90 minutes, my gravity reading was 1.032

Quick Bonus Questions

A. The weight of my grain bill was 4791g
B. The volume of water I mashed with was TWN: 36.13
C. My average mash temperature was 66C

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 12 mins
2. At the start of mash-out, my gravity reading was 1.032

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 8 mins
B. After I pulled the bag my gravity reading was 1.040
C. EOBG 1.052

Brew 2 - Janet's Brown Ale
I did a full-volume mash for 90 minutes.
1. At 90 minutes, my gravity reading was 1.038 (MUST be wrong/incorrect reading)

Quick Bonus Questions

A. The weight of my grain bill was 6397g
B. The volume of water I mashed with was TWN: 37.14
C. My average mash temperature was 66C

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 12 mins
2. At the start of mash-out, my gravity reading was 1.038 (???)

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 8 mins
B. After I pulled the bag my gravity reading was 1.052
C. EOBG 1.066

Brew 1 - Belgian Pale Ale
I did a full-volume mash for 90 minutes.
1. At 30 minutes, my gravity reading was 1.026
2. At 60 minutes, my gravity reading was 1.038
3. At 90 minutes, my gravity reading was 1.040

Quick Bonus Questions

A. The weight of my grain bill was 4791g
B. The volume of water I mashed with was TWN: 36.13
C. My average mash temperature was 65C

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 13 mins
2. At the start of mash-out, my gravity reading was 1.040

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 7 mins
B. After I pulled the bag my gravity reading was 1.041
C. EOBG 1.052

Brew 2 - Belgian Blond Ale
I did a full-volume mash for 75 minutes. It was supposed to be 90 minutes but I got cold - was brewing outside.
1. At 30 minutes, my gravity reading was 1.032
2. At 60 minutes, my gravity reading was 1.044
3. At 75 minutes, my gravity reading was 1.044

Quick Bonus Questions

A. The weight of my grain bill was 6073g
B. The volume of water I mashed with was TWN: 36.94
C. My average mash temperature was 65C

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 13 mins
2. At the start of mash-out, my gravity reading was 1.044

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 17 mins
B. After I pulled the bag my gravity reading was 1.046
C. EOBG 1.070 (Added 673g of sugar during the last 10 minutes)

lambert,

Nice work! so... .... How cold does it have to be to go inside???? I thought you were tough?

BB,
I'm originally from Africa, anything less than 25C is freezing . It was a very mild 0c to 2C with intermittent ice rain showers and hail.

lambert,

You are excused! Anyone from Africa will be excused from cold weather brewing. I don't like to brew in hot weather so it is a draw!

EDIT: Added brew date of March 16th.
American Rogue Dead Guy clone
I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was... #1 tube ; 1.064 ; 15.6 brix
2. At 60 minutes, my gravity reading was... #2 tube ; 1.066 ; 16.2 brix
3. At 90 minutes, my gravity reading was... #3 tube ; 1.068 ; 16.6 brix

Quick Bonus Questions

A. The weight of my grain bill was... 12311 grams ; 27.14 pounds
B. The volume of water I mashed with was... SWN; 45.85 L ; 12.11 G
C. My average mash temperature was... 152 F

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)... 34 mins
2. At the start of mash-out, my gravity reading was...


A. After reaching mash-out temp, before pulling the bag, I waited (mins)... 30 mins
B. After I pulled the bag my gravity reading was... #4 tube; PLG ; 1.068 ; 16.6 brix


MAXI-BIAB
#5 tube ; GIK ; 1.060 ; 14.7 brix
#6 sample ; OG ; 1.074 ; 18 brix

Brew 1

90 minute mash followed by a mash-out.

Gravity at Mash End (90 minutes): 1.026
Gravity at Mash-Out (100 minutes): 1.031

Brew 2

90 minute mash followed by a mash-out.

Gravity at Mash End (90 minutes): 1.021
Gravity at Mash-Out (100 minutes): 1.024

Did a Hochkurtz mash yesterday for a Dunkel (from Brewing Classic Styles) and took the gravity after each rest:
20 minutes at 55C - 1.010
50 minutes at 62C - 1.028
50 minutes at 70C - 1.035
15 minutes at 76C - 1.038

Quick Bonus Questions

A. The weight of my grain bill was 4361g
B. The volume of water I mashed with was TWN: 35.86
C. My average mash temperature was ??C

If you did a Mash-Out

1. To reach a mash-out temp of 76C (169 F) took (mins) 76C - 11 mins
2. At the start of mash-out, my gravity reading was 1.035

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 15 mins
B. After I pulled the bag my gravity reading was 1.038
C. EOBG 1.046 (Should be 1.048 but I did not do the full 90 min boil - had to switch gas bottles towards the end of the brew and did not extend my boiling time to make up for the loss. Lazy)

Brew 1
I did a overnight mash for 570 minutes.
1. At 570 minutes, my gravity reading was 1.023

Quick Bonus Questions
A. The weight of my grain bill was 3140g
B. The volume of water I mashed with was TWN: 35.10
C. My average mash temperature was 67C to 55C over 9.5 hours...

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 25 mins
2. At the start of mash-out, my gravity reading was 1.023

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 15 mins
B. After I pulled the bag my gravity reading was 1.030
C. EOBG 1.038

Brew 2
I did a full volume mash for 90 minutes.
1. At 30 minutes, my gravity reading was 1.024
2. At 60 minutes, my gravity reading was 1.031
3. At 90 minutes, my gravity reading was 1.031

Quick Bonus Questions
A. The weight of my grain bill was 6319g
B. The volume of water I mashed with was TWN: 37.37
C. My average mash temperature was 64C

If you did a Mash-Out
1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 20 mins
2. At the start of mash-out, my gravity reading was 1.031

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 6 mins
B. After I pulled the bag my gravity reading was 1.050
C. EOBG 1.066

Brew 3
I did a overnight mash for 621 minutes.
1. At 621 minutes, my gravity reading was 1.036

Quick Bonus Questions
A. The weight of my grain bill was 4791g
B. The volume of water I mashed with was TWN: 36.13
C. My average mash temperature was 66C to 56C over 10 hours and 21 minutes...

If you did a Mash-Out

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins) 76C - 27 mins
2. At the start of mash-out, my gravity reading was 1.036

A. After reaching mash-out temp, before pulling the bag, I waited (mins) 10 mins
B. After I pulled the bag my gravity reading was 1.041
C. EOBG 1.054

That is some interesting chit there Lambert!

Overnight Mash! That fits my style! Heat it, Mash in, Insulate and go to bed. Correct? Why? (besides the fact that I like the idea because Im lazy)

trout

I can't believe you gained 19 GP from doing a mashout (brew2)

Trout
I'm a pushed for time at the moment so I'm trying to do as many brews in a day/weekend as possible when I've got some spare time. Overnight mash means I can do 2 brews on a day AND have some family time in the afternoon. Yep, as you say, heat water, mash in, insulate and hit some zzzz's.


Mally,
The estimated gravity for the brew (Saison from BCS) at that point was 1.049 so the 1.050 is "expected". The jump from 1.031 to 1.050 is not, and most probably incorrect but I don't want to leave it out - that would be massaging the results. I've cooled and measured the sample the same way as all the others. Who knows, I might not have stirred the mash enough before collecting the sample?! One thing that might be of interest in logging these results would be to note if you stir the mash while heating it to mashout temps. I do, and it seem beneficial. But it's WAY to early to draw any conclusions.

B

Sorry to the MODS for continuing this "off topic" conversation but...
Lambert, what you have experienced there, I see to some degree all the time, see my post here.

I never did get to the bottom of it

EDIT: Added brew date of May 5th and changed EOBG
American Rogue Dead Guy clone
slightly modified recipe from post #42 above using
the 'Adjust Auto-Efficiency by 6.0%'.

I did a full-volume mash for 90 minutes.

1. At 30 minutes, my gravity reading was... #1 tube ; 1.054 ; 13.3 brix
2. At 60 minutes, my gravity reading was... #2 tube ; 1.057 ; 14.0 brix
3. At 90 minutes, my gravity reading was... #3 tube ; 1.057 ; 14.1 brix
**** The weight of my grain bill was... 11219 grams ; 24.73 pounds
I did not mash my 'crystal', I did a Gordon Strong thing

Quick Bonus Questions

A. The weight of my grain bill was... 12311 grams ; 27.14 pounds ****total weight with 'crystal'
B. The volume of water I mashed with was... SWN; 46.89 L ; 12.39 G
C. My average mash temperature was... 152 F

If you did a Mash-Out (and only if you have time.)

1. To reach a mash-out temp of 76-78 C (169 - 172 F) took (mins)... 30 mins
2. At the start of mash-out, my gravity reading was...


A. After reaching mash-out temp, before pulling the bag, I waited (mins)... 15 mins <=== 'crystal added'
B. After I pulled the bag my gravity reading was... #4 tube; PLG ; 1.062 ; 15.3 brix


MAXI-BIAB
after adding my 6 L of MAXI water the GIK was;
#5 tube ; GIK ; 1.058 ; 14.2 brix
#6 sample ; EOBG ; 1.068 ; 16.5 brix