All About Borax
Borax is the common name for a type of sodium borate, an alkaline, crystalline mineral powder mined in both North and South America. Though typically used as a water softener, borax has mild emulsifying properties that make it very useful in handmade creams and lotions. Whenever I use beeswax as an emulsifier, I always add borax to stabilize the emulsion. Even when you use a much more stabler emulsifier like vegetable emulsifying wax, borax gives the finished product a more spreadable texture. Creams with borax has a lighter texture in my opinion and easier to massage into the skin without rubbing it in.
Always add Borax to the water phase of an emulsion.