Put on protective clothing such as gloves, goggles, and a charcoal mask (surgical masks are worthless). Weigh lye into a zip close bag. Weigh water in a bowl. Take lye and water outside to a location inaccessible to children and pets and pour lye into the water, stirring until fully dissolved. Let cool to around 90 degrees Fahrenheit.
8 ounces water, 3 ounces lye
Bring lye water in and when both oils and lye water are at the correct temperature, pour lye water into the oils and blend with an immersion blender on and off until light trace (it begins to thicken like pancake batter).
Scrape soap into the prepared mold and cover. Keep in a warm location (around 75-80 degrees) for 24 hours.
Remove from the mold and cut if necessary. If it's still too soft to remove, then wait another 24 hours. Allow to cure for 3-6 weeks to harden.
Hot Process:
Melt oils and shea butter in a slow cooker.
Put on protective clothing such as gloves, goggles, and a charcoal mask (surgical masks are worthless). Weigh lye into a zip close bag. Weigh water in a bowl. Take lye and water outside to a location inaccessible to children and pets and pour lye into the water, stirring until fully dissolved. Allow to cool.
Bring lye water in and carefully pout it into the slow cooker and blend with a stick blender until it begins to thicken.
Cover and wait 15-20 minutes, depending on your slow cooker. Do not uncover, but check it to make sure it's not scorching on the sides, but slowly bubbling into a mashed potatoes looking consistency.
When the entire batch has changed in texture, remove the lid and add essential oils and spirulina and blend.
Scoop the soap into a prepared mold. Carefully knock the mold on the countertop to get out any bubbles. It's ready to use as soon as it is cool and hard enough.