INCI Name: Sodium borate
Borax (Sodium borate) is a natural mineral composed of white crystalline granules which is widely used in making cosmetics. Since it is also utilized as a detergent, many people are shocked to learn that it is also a main ingredient in their favorite brand of bath salt! Borax naturally occurs from the repeated evaporation of seasonal lakes.
Borax is found as an additive in creams, lotions, shampoos, gels, bath salts, and bath bombs. It is an emulsifier, preservative, cleansing agent, and a buffering agent.
Borax is commonly used in bath salts, borax has the ability to soften the water, and suspend soap particles in the bathwater. The result is soft, clean, and healthy skin, which is not clogged by the residue of soap particles.
When used in collaboration with citric acid in bath bomb or bath salt recipes, the product will produce a fizzing action. It also forms bath or body gel, when mixed with water and guar gum.
Simply mix Borax into the water portion of your recipe, and heat to a temperature of above 75 °C. Stir until fully dissolved, and then incorporate into your recipe.