boydster
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Regarding the CO2 needing time to absorb into solution, take a look at this thread: https://www.homebrewtalk.com/f128/carbonation-differences-bottles-varying-temps-441011/
By cooling the bottle, you're allowing any chill haze (which could create nucleation sites for the CO2 to come out of solution) to settle, and ensuring that the CO2 doesn't rapidly come out of solution due to pressure change when the cap comes off. It's a HBT myth that the bottles need fridge time to absorb CO2 from the headspace into the beer, though. The myth is confirmed by experience, sure, but it's not for the reason that it is generally attributed to.
By cooling the bottle, you're allowing any chill haze (which could create nucleation sites for the CO2 to come out of solution) to settle, and ensuring that the CO2 doesn't rapidly come out of solution due to pressure change when the cap comes off. It's a HBT myth that the bottles need fridge time to absorb CO2 from the headspace into the beer, though. The myth is confirmed by experience, sure, but it's not for the reason that it is generally attributed to.