Hi, I think there is a minor mistake in the Hop Age tool. It's not a bug, therefore I decided to post in this section...
This article (http://www.morebeer.com/brewingtechniques/library/backissues/issue2.1/garetz.html) claims that HSI is "a number obtained by spectrophotometric determinations of the a- and b-acids ", whilst in BeerSmith (and in the related blog article!) the HSI is supposed to indicate the percent of alfa acid lost in 6 months (%lost). This is not true, because the relation between %lost and HSI is %Lost=log(HSI/0.25)*110.
Am I right?
This article (http://www.morebeer.com/brewingtechniques/library/backissues/issue2.1/garetz.html) claims that HSI is "a number obtained by spectrophotometric determinations of the a- and b-acids ", whilst in BeerSmith (and in the related blog article!) the HSI is supposed to indicate the percent of alfa acid lost in 6 months (%lost). This is not true, because the relation between %lost and HSI is %Lost=log(HSI/0.25)*110.
Am I right?