I'm sorry Grandma if I confused you. My bad! I do not use a 50% lye solution in my batch of soap, never have, never will. My recipes range from 28 to 33% lye solutions. I add very cold farm fresh goat milk to my batter to bring down my lye percentage to the 28 to 33% range. A 50% lye solution used straight in a batch is considered "unsafe." Anything over a 40% lye solution is considered an "unsafe" standard as far as that goes. That is what most online calcs. will show. Yes, like Jbren mentioned, a 50% lye solution is 50%, by weight lye, and 50% liquids by weight, as a 33% is 2 parts liquids to 1 part lye, or a 25% solution is 4 parts liquids to 1 part lye. The amount of lye needed to saponify a batch is a set number; (x) ounces of oils to (x) ounces amount of lye to saponify the acids in the oils with the base. The water or other liquids act as a aid to safely incorporate the lye into the chemical process of saponification. You can use a 25% lye concentration, or a 40% lye concentration, all the difference is the amount of water or liquids used and curing time. I hope this sound OK and makes since. For now, if you want to premix, I'd stay with a 30 to 33% lye saturation. Like I mentioned above, a 50% solution is "unsafe" to use by itself, in a batter. I add very cold goat milk to my batter to bring my lye concentration down upon emulsification, to between 29 to 33%. I have never went above 35% lye solution in a recipe (discounted liquids). Paul....