Aloe Vera Naturally Compliant Body Lotion (Free Formula)
I am using a camellia seed oil that has both a color and scent. It made the final emulsion have a green tint and slightly grassy smell. If that is not something that you want go with the refined version. To make the product lighter, I added lauryl laurate. It is a natural plant ester derived from coconut oil.
To ensure the plant oil does not oxidize too quickly, I am adding both a chelator and mixed tocopherols. Yes, the mixed tocopherols are in the heated phase. For lab batches, the vitamin E is not going to be heated long enough to be effected.
For the preservative, I am using Euxyl PE 9010. The supplier recommend mixing it with a glycol (such as glycerin, propylene glycol, propanediol 1,3, etc) before adding it to products. I am using glycerin to slurry it in.
This formulation creates a lovely cream that give the skin a nice glow.
Calculations:
100-(10+0.2+2+7+10+5+0.10+3+1)=61.7
61.7*2 = 123.4
Method:
Disinfect all glass wear and utensils with 70% Isopropyl Alcohol. Sanitize all your equipment, containers, and workspace. Gather all your ingredients and make sure that your notebook is set up. Weigh out phase A in a glass beaker. Get a separate beaker for phase B and not down its weight then add the phase B ingredients. Heat phases A and B in a double boiler until phase B is melted and both phases are roughly the same temperature 167⁰F(75⁰C). Heat in a double boiler for an additional 20 minutes. Pour the water-phase into the oil-phase, and apply high shear with a high shear mixer. Start slow, you do not want to splash liquid emulsion everywhere. Be mindful not to move the mixer up and down to incorporate a lot of air. Blend for 2-5 minutes. 2-3 for a homogenizer and 3-5 for a stick blender. As the lotion is cooling, let pulse it with a stick blender. Alternatively, mix with a overhead mixer with a low shear blade. Do this until below 104⁰F (40⁰C) or when your preservative or other cool-down ingredients are allowed to be added. Now it is time to account for the water loss. Reweight the phase B beaker. Take the difference from the original weight to the new weight. This is how much product you have. Make up the difference with distilled water for what the batch size is. For example if you are making a 200g batch you would get the product weight to 200g. This accounts for the water evaporated during heating AND cool down. Check and adjust the pH, if needed. See below on how to do that. Package and label your latest formulations. The product will reach the full viscosity the next day.
Adjusting pH:
Adjusting pH (Dilution Method): Get two beakers; one will be used as our washing beaker, and the other will be used to make the dilutions. The main thing with making dilutions is you want to make enough that the probe can be covered. You can weigh out 1 gram of product and 9 grams of distilled water to make a 10% dilution. Or you can weigh out 2 grams of product and then 18 grams of distilled water. Get your pH meter out and rinse with distilled water into the other beaker I had you get. Dry off the meter with a lint-free product. Mix it well and take the pH. If you are using strips, do not make a diluted solution no matter the viscosity; or the pH will be way off. Do not put the strips directly into the product. Even if you are taking the pH of the product directly, you want to add your product into a separate beaker. Wait for the reading to be stable, take a note of the pH, and discard the Sample after. Then put the product on the scale and tare it. Add 0.10g either the 50:50 citric acid solution (to lower the pH), the sodium hydroxide (to raise the pH), or TEA (to raise the pH of the product). Stir well, then wait at least 1 minute before making another dilution. Keep repeating the process until you get the desired pH. You will be surprised how much it may take. I recommend making a bigger batch than you want so you can account for that.
Substitutions and Alterations:
Substituting ingredients will change the final feel, viscosity, and overall effect of final product. percentages and formulating procedure may need to change with substitutions. These substitution suggestions are just suggestions and have not been tested to work.
To find out where to purchase ingredients check out the ingredient suppler page.
You can use another chelator in place of tetrasodium glutamate diacetate.
You can use another oil or ester in place of the one that I have used.
Sources and References:
