The longer the hop is boiled the more the utililistion of Alpha Acids (up to a point). Hops boiled for 60 minutes will reach near max utilisation, hops boiled for 30 seconds will yeild no Alpha Acid but lots of the lovely hop aroma that is driven off in a long boil.The kilo of hops, in the boil for how long?
I heard on one of the Brewing Network shows a method of putting a big amount of hops in the boil for only a couple of minutes
The actual recipe is at home but it is along the lines of
70% of grist Floor Malted Pale Ale..say 7 kilos
30% of grist Melanoidan..say 3 kilos
Mashed at 68 - 69
First hop addition at boil (60 minutes) 100gms Cascade 5.8%
40 minutes 100gms Cascade
30 minutes 100gm cascade
20minutes 100gms Cascade
10 minutes 100gms cascade
0 minutes 500gms cascade
Yeild = 44 litres
Starting gravity 1070
Yeast = Wyeast London ESB 1968
Final Gravity 1020
The high mash temperature led to a massive malt profile which was somewhat balanced by the mega hopping.
You literally got a hop buzz from this beer!!
Had this note from another brewer when it was about 2 weeks old !!
"Great beer last evening; well-balanced, clean, excellent hop character.
You will be very proud of it after at least a month of lagering.
Thanks for bringing along a sample for me to taste."
Kurtz