Prep + Prime Transparent Finishing Powder
Highlights
Skim through
| Ingredient name | what-it-does | irr., com. | ID-Rating |
|---|---|---|---|
| Zea Mays (Corn) Starch | viscosity controlling, abrasive/​scrub | ||
| Silica | viscosity controlling | ||
| Mica | colorant | ||
| Zinc Stearate | colorant, viscosity controlling | 0, 0 | |
| Caprylyl Glycol | moisturizer/​humectant, emollient | ||
| 1,2-Hexanediol | solvent |
MAC Prep + Prime Transparent Finishing PowderIngredients explained
A corn-derived, white to yellowish, floury powder that works as a handy helper ingredient to create nice feeling emulsions.
It gives a generally pleasant skin feel, has some mattifying effect (though rice starch is better at that), it reduces greasiness and tackiness and helps the formula to spread easily without whitening or shininess.
A white powdery thing that's the major component of glass and sand. In cosmetics, it’s often in products that are supposed to keep your skin matte as it has great oil-absorbing abilities. It’s also used as a helper ingredient to thicken up products or suspend insoluble particles.
A super versatile and common mineral powder that comes in different particle sizes. It is a multi-tasker used to improve skin feel, increase product slip, give the product light-reflecting properties, enhance skin adhesion or serve as an anti-caking agent.
It is also the most commonly used "base" material for layered composite pigments such as pearl-effect pigments. In this case, mica is coated with one or more metal oxides (most commonly titanium dioxide) to achieve pearl effect via the physical phenomenon known as interference.
Zinc Stearate is probably the most commonly used binding agent in powder makeup products such as face powders or eyeshadows. It gives very good adherence qualities meaning it helps powders to stick together in the pan and to stick to the skin on application. It is typically used at 3-10%, too much of it though can cause lumpiness or greasiness on the skin.
It’s a handy multi-tasking ingredient that gives the skin a nice, soft feel. At the same time, it also boosts the effectiveness of other preservatives, such as the nowadays super commonly used phenoxyethanol.
The blend of these two (caprylyl glycol + phenoxyethanol) is called Optiphen, which not only helps to keep your cosmetics free from nasty things for a long time but also gives a good feel to the finished product. It's a popular duo.
A really multi-functional helper ingredient that can do several things in a skincare product: it can bring a soft and pleasant feel to the formula, it can act as a humectant and emollient, it can be a solvent for some other ingredients (for example it can help to stabilize perfumes in watery products) and it can also help to disperse pigments more evenly in makeup products. And that is still not all: it can also boost the antimicrobial activity of preservatives.
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| what‑it‑does | viscosity controlling | abrasive/scrub |
| what‑it‑does | viscosity controlling |
| what‑it‑does | colorant |
| what‑it‑does | colorant | viscosity controlling |
| irritancy, com. | 0, 0 |
| what‑it‑does | moisturizer/humectant | emollient |
| what‑it‑does | solvent |