I made soap!
This shouldn’t be very surprising. I already make my own mead, preserves, soups, and occasionally bread. Soap follows a similar theme. I’ve been planning this for a long time.
I started a thread about this first batch on the Latherings forum. My message there assumed that the reader already knows how to make soap. For everyone else, I’ll include more about the soap-making process as we go.
My recipe started with the Favorite Castile/No Palm Oil recipe on Kathy Miller’s web site. I scaled the ingredients down to 25% and replaced the relatively expensive olive oil with canola. Here’s a list:
… 18.5 oz canola oil
… 3.5 oz coconut oil
… 3 oz Red Devil lye crystals
… 6.5 oz ice-cold water
Soapmaking involves the use of sodium hydroxide, also known as lye. I know how to make lye the old-fashioned way from rain water and wood ashes, but I’d rather not. It sounds too much like work.
Finding a local source for pure lye crystals was quite an adventure. I went to Home Depot, two Wal-Marts, Dollar Tree, Super Target, and Sam’s with no luck. Apparently pure lye has fallen into disrepute among the big retailers, due to a combination of its use in meth production and the drain-cleaner industry’s general trend towards gels and liquids. The brand most often mentioned in recipes, Red Devil, has been reported recently to be out of production.
Finally I found some Red Devil crystals at Albertsons. Later I found it at the IGA around the corner too. If the rumors about Red Devil are true, I might have to look into other options. Anyone know of a wholesale NaOH supplier in central Oklahoma…?
The coconut oil came from Wal-Mart. Fascinating stuff. Its melting point is somewhere between our programmable thermostat’s day and night settings. One day it was a solid, and the next it was a liquid! It tastes like Crisco.
I bought the canola oil at Sam’s. Nothing special about it, really, other than its low price. I like cooking with it.
Mixing the ingredients reminded me of chemistry class. First I sprinkled the lye crystals into the cold water in a Pyrex measuring cup. Immediately the water’s temperature shot up from a hair above freezing to 170 deg F. I set it aside to cool off.
Next, I poured the two oils together in a stainless steel saucepan. (It was the bottom half of my double boiler, one of the few pots actually labeled “stainless steel”. I’ve been told that lye does Bad Things to aluminum.) Turning on the stove, I heated the oil mixture until it stopped looking like a swirl of two different oils. At that point it was about 150 deg.
I ran off and did something else for a while. When I came back, both containers had cooled off enough. The oil was about 100 deg and the lye was down to about 115. I slowly poured the lye into the oil and stirred it with a plastic spoon.
And stirred, and stirred… The mixture started to turn into a golden milky slime. It got thicker and cloudier as the stirring continued. The plan was to stir until “trace”. I’m not sure how to explain what exactly that means. The test involved drizzling a spoonful of the mixture across the rest. If the drizzled substance stayed visible for several seconds, it was trace.
After 45 minutes of stirring I was bored silly. I took a 10 minute break and came back. The mixture had settled into a soapy layer with a layer of oil on top. I started to stir it again, and some of the oil splashed out of the pan. I scooped it up with my finger.
Looked like oil.
Felt like oil.
Smelled like oil.
Tasted like the terminals on a fresh 9V battery…
After swishing cold water for a few minutes and drinking something slightly acidic, I decided that I shouldn’t worry about having too little lye. I resumed stirring.
An hour and a half had passed since mixing oil and lye. No sign of the “trace” condition. I was bored again.
Out came the electric wand blender. With that, the mixture went from milky to “trace” within a minute. The lesson: Modern technology is good.
I poured the soapy slime into a plastic velveeta box lined with wax paper. (The box really says “velveeta” in big letters.) The lid snapped on, and for extra insulation it went into the wand blender’s original cardboard box.
The next morning it was white, almost solid, and smelling pleasantly soapy. 24 hours after that I pulled it from the mold and cut it into inch-thick slices. The plan is to “cure” the bars for 2 to 6 weeks before testing.
There could be one small problem. Remember how the recipe called for 3 oz of lye? Well, my kitchen scale is analog, not digital, and each ounce mark is about a millimeter apart. Maybe it was 3 ounces. Maybe it was 3.5 instead. I don’t really know.
That half ounce makes a big difference in pH for a batch this size. If all went to plan, the soap will be firm and mild. If not, it’ll be harsh and crumbly, and it’ll have to be melted and remolded with more oil. I’ll have to do some tests to be sure. Either way, I’m looking into getting a more precise digital scale. It won’t cost much.
I was pleasantly surprised at how easy soapmaking is. It’s about as hard as making a pot of soup and freezing the leftovers. I’m already planning molds and cutters for a larger batch.
Any suggestions for color and fragrance?