Originally Posted by jpeebs
Yeah I'm doing extract with, usually, 2.5 gallon boils. How much will adding more water to the boil affect the color? And will it affect anything else? I imagine OG would be different from expected. Guess I'll have to do some research on it. Thanks!
It won't affect the OG if your final volume is the same.
The theory, and Yooper will have to verify if it is true or not (I've merely been told it was true and based on my one experience of a dark brown blonde I choose to believe it) is that "cooking" the extract darkens the color.
Thus adding the LME at flameout results in a lighter colored beer because the LME never gets "cooked".
I haven't heard that a size of the boil affects color but if cooking darkens the color then it makes sense and if someone were to tell me it was so, I'd believe them. Material is more likely to get cooked if its at a higher concentrate.
Think of it like burning sugar. Make a sugar water syrup and cook it for a while. It'll turn brown. If you cook it for a short time it won't turn brown. Ergo late additions mean lighter beer.
If the sugar concentrate is thick it will turn brown sooner than a thinner syrup. Ergo fuller boils make lighter beers.
Or people are pulling my niave leg. Well, I did have one very early addition blonde that came out very much a brunette and I had one very late a addition blonde of the exact same recipe that came out a dusty straw. So I'm a convert.