|What is it?||Corn starch is starch isolated from corn. It’s a common kitchen ingredient, where it is often used for thickening.|
|INCI||Zea Mays Starch|
|Appearance||Fine white powder|
|Usage rate||Up to 100%|
|Texture||Soft, smooth, silky|
|Why do we use it in formulations?||In anhydrous products it helps reduce the greasy/oily skin feel, and in higher concentrations it can give the entire product a powdery, dry-touch finish and contribute to thickening.
In powdered cosmetics it acts as a diluent and improves slip.
It can also be used in dusting powders, or even used as-is for a dusting powder.
|Do you need it?||No, but there’s a good chance you already have it!|
|Strengths||Readily available, inexpensive and effective ingredient.|
|Weaknesses||Unsuitable for anyone with corn allergies.|
|Alternatives & Substitutions||Other starches, like wheat or arrowroot, and good alternatives to corn starch.|
|How to Work with It||In anhydrous products, add to the oil phase—I like to let it soak with the liquid/melted oils and then stir everything together. In powdered products, include it in the grinding phase.|
|Storage & Shelf Life||Stored somewhere cool, dark, and dry,|
|Tips, Tricks, and Quirks||Some companies sell corn starch in a shaker bottle as a natural baby powder—if you want to try that just put your own (cheaper!) corn starch in a shaker bottle!|
|Recommended starter amount||100g (3.3oz)|
|Where to Buy it||Buy it from an online DIY ingredient supplier or Amazon.|