Originally Posted by wobdee
Do you find the 90 min mash necessary for complete conversion or are you just playing it safe?
I have been experimenting and find that 90 minutes increases my extraction. Below are figures from a recent brew and are fairly typical of my results.
15 minutes: 7.4 brix/1.0282 (mash temp 154F)
30 minutes: 7.8 brix/1.0298 (mash temp 154F)
45 minutes: 8.6 brix/1.0329 (mash temp 154F)
60 minutes: 10.0 brix/1.0384 (mash temp 152F)
75 minutes: 10.5 brix/1.0404 (mash temp 150F)
90 minutes: 11.2 brix/1.0432 (mash temp 150F)
Ramped up to 168 and rested at mashout for 10 minutes:
100 minutes: 11.4 brix/1.0440 (mash temp 167F)
As I am oft to repeat ad nauseam: "Disregard the conventional "facts" and try things for yourself to see what works for YOU".