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Step 1
Using a digital scale, measure out the lye and water in separate glass containers. Combine them by adding the lye to the water. (Remember: snow floats on the lake.). Stir until the lye dissolves. The temperature will shoot up. Place this in a safe place to cool.
Step 2
While the lye solution is cooling, measure out the oils and butters and combine them in a large stainless pot. Melt them over low heat and heat them up to 130-140 degrees. Set them aside to cool.
Step 3
After 2 hours, check the temperature of both solutions. They should be around 110 degrees. (A range of 100-120 is fine.). If not, allow them to cool longer.
Step 4
Prepare your mold and measure out any fragrance or color you will be adding. (For best blending of colors, mix some color into a few drops of melted oils.). If using sodium lactate, add it to the lye water at this time.
Step 5
Pour the water and lye solution into the pot with the melted oils. Blend with a stick blender until thin trace is reached. The soap batter will noticeable thicken and a trail of soap will sit on top of the liquid rather than immediately sinking in. (This will take about 1 minute.). Add the color and fragrance and stir by hand.
Step 6
mmediately pour the soap batter into the mold. Place in a turned off oven or wrap with blankets to insulate the soap.
Step 7
After 24 hours of curing, unmold and cut into bars. The bars may seem slightly soft but will harden considerably during the curing process. Allow to cure at least 3 weeks in a well-ventilated place.