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Mash Hops IBU contribution

Posted: Fri Aug 27, 2010 8:42 am
by TimmyR
I am not sure what the "standard" is but I've found most recipes I use tend to treat the IBU contribution of mash hops as equal to a 20 min boil addition.

That also seems to match how some other software treats those additions. Can you explain why mash hops contribute no IBUs in your software or consider looking at allowing some IBU contribution? It would help the process of export/import of recipes.

Posted: Wed Apr 27, 2011 8:19 pm
by TimmyR
Can you provide any help on this? Thanks.

Re: Mash Hops IBU contribution

Posted: Wed Apr 27, 2011 9:55 pm
by slothrob
TimmyR wrote:I am not sure what the "standard" is but I've found most recipes I use tend to treat the IBU contribution of mash hops as equal to a 20 min boil addition.

That also seems to match how some other software treats those additions. Can you explain why mash hops contribute no IBUs in your software or consider looking at allowing some IBU contribution? It would help the process of export/import of recipes.
Do you mean First Wort Hops?

That technique is often described as delivering a bitterness that seems equivalent to a 20 minute boil, even though the chemical analysis would indicate that the IBUs are more equivalent to a 60+ minute boil. Perhaps this is due to a smoother bitterness, but not every brewer uses the same adjustment. This is a way to use bittering hops while preserving hop flavor and getting a mild character in the bitterness.

Mash Hops, on the other hand, give very few IBUs. The recipes that I know that use this technique are often listed as less than 10 IBUs. This is historically only used in beers that must have very little bitterness, like Berliner Weisse, but is now sometimes used as a way to squeeze a few more hops into an IPA.

The way that I use this feature in BTP is to select FWH (or Mash Hops, as the case may be), then select a time that represents my expected hop utilization. 20' for FWH, for example. It would be a nice feature to be able to set this utilization behind the scenes, so that the recipe doesn't say that you added the hops at 20 minutes, but I suppose the effect is the same.

Posted: Fri Feb 10, 2012 5:51 am
by matte75
I would like to have this too, even though some think this hop addition is just a way to have i nice smell in the brewhouse! In Promash you are allowed to decide the procentage of the mash hop, for example that the isomerization is 30% of a regular hop addition, i think this could be a good way to go.

For now i use it as slothrob does, but it woud be great to have the mash hopping as a post in the printout and the brewing record.

thanks
//Mattias, Sweden

Re: Mash Hops IBU contribution

Posted: Wed Nov 14, 2012 12:43 am
by matte75
Bumping this thread...

Please, a mash hop stage!! i really use this myth..

/Mattias