Starting cosmetic formulation is easier when you treat every product as a structured experiment.
Begin with a clear product goal: texture, skin feel, target user, packaging, and expected use. Then separate the formula into phases, record each ingredient by percentage, and keep notes about processing temperature, mixing order, and observations.
A useful formulation notebook should include the version number, batch size, ingredient supplier, manufacturing steps, stability notes, and changes for the next trial. This turns each sample into learning instead of guesswork.
For beginners, focus on one product type at a time. Build a repeatable base, test small changes, and document every result before expanding into more complex formulas.