- Mercury Cell Process
- Diaphragm Cell Process
- Membrane Cell Process
The first two processes raise concerns of trace contamination with mercury and asbestos; however, the third process produces the highest quality of lye with the least amount of energy consumption.
The risk of contamination doesn't stop there. A chemistry plant will make a lot of different chemicals using the same equipment. Just like how chocolate bars "may contain traces of nuts" and rice "may contain traces of gluten," lye may pick up traces of other heavy metals like lead.
Food Grade Lye Is Accurate
Knowing my lye is 100% pure, uncontaminated lye means that 5lbs of lye equals 5lbs of lye. Tech grade lye (drain cleaner) could range from anywhere between 90%-97% purity. My 5lbs of contaminated lye could really be only 4.8lbs, 4.65lbs, or even 4.5lbs of actual lye.
Guessing the purity of lye leads to calculation errors -- granted, in your favor. Less lye means less oils are turning into soap resulting in more oils being left over to moisturize your skin, so it's not like you're going to wash your skin right down the drain. However, why wash in a bathtub full of mercury, asbestos, or even lead when you don't have to?
OK, I exaggerated a bit there -- it wouldn't be a bathtub full, just trace amounts. But still.
Becky's Tallow Treasures uses lye that is certified food grade and certified kosher
Would you put a junk-yard engine in a brand, new Ferrari?No. And, I wouldn't either.