What else can one quanties of clean rendered fats for, other than soap????
Google “purchase lye” - lots of sources.
http://www.essentialdepot.com/servlet/the-Sodium-dsh-Hydroxide-dsh-Lye-dsh-Food-dsh-Grade/Categories
http://www.essentialdepot.com/servlet/the-Sodium-dsh-Hydroxide-dsh-Lye-dsh-Tech-dsh-Grade/Categories
Where to buy lye for soap making
http://candleandsoap.about.com/od/coldprocesssoapmaking/a/lyesources.htm
I buy ours at a local chemical supply house in 50 lb bags.