News — dry skin care
A skin cream is basically a blend of oil and water. To produce a light cream, you start with an oil-in-water emulsion. To make a richer cream or a salve, you reverse the proportions, producing a water-in-oil emulsion. So the ingredients are essentially the same, it’s just the proportions that are different. To make sure the mixture of oil and water holds together over time and doesn’t separate, you add an emulsifier. Emulsifiers bind together liquids that are partly hydrophilic (attracted to water) and partly hydrophobic (with an affinity for oil). Skin cream can be compared to mayonnaise, in which...