It takes a lot of time and energy to heat vats of oils and waxes and vats of water and water soluble ingredients to 70°C or more then, after they have been mixed together, it takes more time and energy to cool the result back to ambient temperature. For this reason cold process emulsifiers are becoming increasingly popular as manufacturers search for ways of reducing costs. If it is possible to make the product at room temperature there are other benefits; perfumes and volatile ingredients may be added at any stage of the process and the marketing department may claim the product to be environmentally friendly with a reduced carbon footprint.