Superfat refers to leaving some oil unconverted in the finished soap. Learn why this matters for skin feel and how the principle can be considered when designing soap for dry, oily or more general skin needs.
Not all soap lather is the same. Some cold process soaps produce abundant visible bubbles, while others create a denser, creamier lather. Learn why ingredient choices influence both the amount and character of a soap’s lather.
What makes one cold process soap firm while another stays comparatively soft? Learn how hard and soft oils, butters and lathering oils influence soap hardness—and why making a harder bar is ultimately about balance.
Korean skincare is about more than using many products. Learn how hydration, exfoliation, brightening and skin-tightening ingredients work across toners, serums, creams, masks and skin polishes—and how the different products fit together.
Toner and serum can both contain active skincare ingredients, but they don’t play the same role. Learn how a Korean skincare tonic differs from a more concentrated serum and where each fits into a skincare routine.
Snail mucin is an animal-derived ingredient used in Korean skincare and is not vegan. Learn what snail mucin is, how the cosmetic ingredient differs from raw snail secretion, and why its origin matters when choosing skincare.
Glycerin and propanediol can both be used for hydration, but they can feel quite different on the skin. Learn why glycerin may sometimes feel sticky or sweaty and why propanediol can be a lighter-feeling alternative.
Some skincare products are better suited to nighttime use because of the ingredients they contain. Learn why glycolic acid, lactic acid and certain photosensitive ingredients can influence whether a product is designed for day or night.
A Korean skin polish is a form of physical exfoliation designed to smooth uneven texture and remove dead surface skin. Learn how its very fine exfoliating particles create a different experience from a conventional coarse scrub.
Rice ferment filtrate and homemade fermented rice water are not the same thing. Learn why the cosmetic ingredient is different from rice water fermented at home, and why the distinction matters in formulated skincare.
