Glossary · Manufacturing
What Is Hot Process?
Hot process manufacturing heats the oil and water phases separately before combining them, which is necessary when a formula contains solid fats, waxes or emulsifiers that must be melted to form a stable emulsion. It is the standard route for creams, lotions and balms.
Why it matters when you source
Most rich textures require heat, which adds heating, cooling and hold time to the schedule — part of the reason a cream's lead time differs from a toner's. When a supplier quotes an unusually short lead time on a cream, ask which process they intend to run.
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