IN HONOR OF ST. PATRICK’S DAY – GUINNESS SCIENCE!
The Science Behind The Bubbles In Your Pint. Ever wonder why the bubbles in Guinness sink as opposed to rise? Using computer models and lab experiments it was reveal the answer lies in the geometry of the pint glasses in which stouts are poured. Because of this shape the beer flows downward near the walls of the glass, dragging the tiny bubbles along with it, and then upward. This circulatory pattern is what causes that creamy white head of foam which rests on top of the black brew.
NOW, HOW TO POUR THAT PERFECT PINT?
You probably didn’t know the process is actually broken down into 6 steps! 6 steps may seem like a lot but trust me it’s worth it.
The Science Behind Pouring The Perfect Pint
Step 1 Find a Guinness-branded glass. This may seem like it’s not that important but the harp logo actually serves as a guideline for many of the following steps.
Step 2 Hold the glass at a 45 degree angle, and the draught Guinness should be poured by pulling the tap forwards and aiming the flow at the inside of the glass where the harp logo is.
Step 3 Once the bottom of the harp has been reached by the incoming liquid, the bartender must then start to straighten the pint glass to upright by the time the liquid reaches the top of the harp.
Step 4 The bartender places the still-cloudy not-quite-a-full-pint on the bar and waits for the bubbles to surge down the sides of the glass and up the center to form the head.
Step 5 Time to top up the pint! A high pressure top up would destroy the delicate bubbles so bartenders are told to push the tap away from them in this second stage of pouring, as this halves the force of the flow, filling the glass to the top without destroying too many bubbles.
Step 6 Enjoy your perfectly poured pint!
Guinness brewery estimates 13 million pints are consumed worldwide.
HAPPY ST. PATRICK’S DAY
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