NaOh/KOH shave soap

[bodhi]

So, songwinds shave soap peaked my interest and after reading a few of you wet shaver guru's posts, im thinking i am not only going to try songwinds recipe but try and make up one of my own too. Im thinking of using a naoh/koh combo. Im wondering though, and this may be irrelevat, but im a ls maker too... when calculating the recipe, how do you figure in the purity of the koh? would calculating the whole batch at a 0 sf work and just guestimate that it works out to around a 10%sf or do you guys(and gals!) still tend to calculate a sf in your split batches too?

 

[fatfacedcharlie]

I must admit that I don't worry about the purity of KOH when doing lye calculations, if I'm doing a batch that gets 50% of the lye from KOH and the rest from NaOH I just calculate half of the batch with one, half with the other and mix it all up together.

 

[bodhi]

Thanks Charlie