Hi there
@Maple_Street_Bath! I'm quite sure that your itchy feeling is coming from too much magnesium. That will definitely make the skin itchy, and sometimes will even give a burning feeling, or turn it red. That's exactly why I no longer use straight magnesium "oil" (or brine, as you called it) on my skin.
I'm happy to share the recipe that I used, which came straight off the internet somewhere. I'd love to give credit to the person who shared it, if I could only remember where I found it! Besides, I tweaked it considerably because I wanted to use up some herb-infused jojoba oil that I had from another project. It turned out so nicely (great absorption, no soaping, no greasy after-feel), that I've kept using jojoba oil as the main oil. In any event, here is the recipe that I use and love, with my personal notes in blue:
Water phase
242 grams distilled water
(you can use less if you prefer a thicker cream).
52 grams double-strength magnesium oil (see recipe below)
Oil Phase
60 grams herb-infused jojoba oil (
or other liquid oil and butters of choice)
8 grams shea butter or mango butter
15 grams ewax
12 grams cetyl alcohol
Cool Down Phase
8 grams Leucidal
(I actually used 1.5g Liquid Germall Plus instead)
3 grams lavender EO (or other EO in skin-safe amount)
Instructions
Make the magnesium oil by dissolving ½ cup magnesium flakes into ¼ cup distilled water.
You won't use all of this for a batch, but it keeps well if stored in a well-sealed container away from light and heat.
Measure all water phase ingredients in one heatproof container, and all oil phase ingredients into another.
Heat both containers to 175F and hold for 20 minutes.
Add water to oil and stick blend continuously for one minute.
Continue to blend for 20-30 seconds at a time as it thickens and cools.
Once the mixtures cools off to 140F
(120F if using LGP instead of Leucidal), add the cool phase ingredients.
Continue mixing off and on until the mixture is thick and fluffy.
Decant into a sterilized container and cover with a towel until completely cooled.
Seal container and store away from light and heat.