Okay, so I was making an experimental batch of shaving soap. In the soap was about 30% Tallow, 20% lard and oils such as grape, olive and 76F coconut oil. I also put in a good amount of stearic acid and some clay for the slip. My lye was sodium hydroxide and I got the oils down to about 115-118 Fahrenheit and the lye water was around 100F. I had my stick blender barely moving and I began to trickle in the lye and to my surprise - BAM! It turned instantly into the thickest mess you'd ever seen. I'd equate the thickness to cookie dough. I quickly added more water until I could work with it, turned up the heat and waited for the worst. To my surprise it used up the water and eventually (about an hour) it became very pourable. However, it would harden FAST if the heat began to drop. It made beautiful soap and lathered up like mad, but what gives? Why the instant super thick trace?