Most-Consulted Answers
Short answers to the questions readers return to. Each points to the chapter that covers it in full.
How long does mascara last after opening?
About three months. Discard it sooner if it smells odd, turns clumpy or irritates your eyes. See Chapter II.
What does the open-jar symbol mean?
It is the period-after-opening symbol. The number followed by "M" shows how many months the product stays good once opened. See Chapter IV.
Does sunscreen go on before or after primer?
Sunscreen is the last step of skincare. Let it settle for a few minutes, then apply primer and base. See Chapter I.
How do I find my foundation shade?
Swatch two or three shades along the jawline, wait about ten minutes and check in daylight. The shade that disappears into face and neck is the match.
How do I tell my undertone?
Compare gold and silver against your skin, or hold a white and an off-white cloth to your face in daylight. Gold and cream favor warm undertones; silver and white favor cool; if both look fine, you are likely neutral. No home test is perfect, so confirm with a foundation swatch.
How often should makeup brushes be cleaned?
Brushes used with liquid or cream products roughly weekly; powder and eye brushes every one to two weeks. Damp sponges benefit from washing after each use.
Is it safe to share makeup?
It is best avoided, especially eye and lip products, which can transfer bacteria and viruses. Use disposable applicators at testers.
How do I make lipstick last longer?
Prep the lips, fill them entirely with liner, apply lipstick, blot, dust powder through a tissue, then apply a second layer. See Chapter III.
What is a patch test?
Apply a small amount of a new product behind the ear or on the inner arm and watch the area for 48 hours before using it on the face. Seek medical advice for any significant reaction.
Is makeup regulated?
Yes. In the EU, Regulation (EC) No 1223/2009 governs cosmetics. In the United States, the FDA oversees cosmetics under the Federal Food, Drug, and Cosmetic Act, strengthened by the Modernization of Cosmetics Regulation Act of 2022.