Korean glass skin: the technique and the routine

Glass skin has three observable qualities. First, light reflectivity: the skin surface reflects light evenly across the cheek and forehead, without dry patches that absorb light or oily areas that produce competing highlights. Second, even tone: pigmentation, redness, and texture variations are minimised so the skin reads as a continuous surface. Third, dewy hydration: the skin retains a subtle gloss without looking oily or wet.

The look should not be confused with 'wet look' makeup (which uses topical glosses to create temporary shine) or 'mochi skin' (the Japanese counterpart, which prioritises softness over reflectivity). Glass skin is a longer-term skin state achieved through routine, not a single styling moment.

Step 1: double cleanse. Oil-based cleanser first to dissolve makeup, sunscreen, and excess sebum; water-based cleanser second to remove the dissolved oil. The starting point of nearly every glass-skin routine.

Step 2: gentle exfoliation, two to three times weekly. AHAs (lactic acid is the gentlest commonly used) remove the topmost dead skin cells that scatter light unevenly. Over-exfoliation destroys glass skin; the rule of thumb is less is more.

Step 3: essence and serum layering. A fermented essence (galactomyces, snail mucin filtrate) is patted in first, followed by a targeted serum (niacinamide for tone, hyaluronic acid for hydration, peptides for firmness). Multiple thin layers absorb more effectively than one thick layer.

Step 4: moisturiser. A water-based gel-cream is preferred over heavier creams because gels distribute light evenly and don't separate into visible patches over the day. Some practitioners add a final occlusive layer (a thin film of facial oil or sleeping mask) over the moisturiser to seal everything in.

Step 5 (AM only): SPF. The single most-important step. Photoageing destroys glass skin faster than any other factor. SPF 30+ minimum, reapplied every two hours of outdoor exposure.

Three things destroy glass skin faster than the routine can build it: aggressive exfoliation, dehydration, and unprotected sun exposure. Over-exfoliation (daily acids or harsh physical scrubs) damages the moisture barrier and the skin compensates by producing rough patches and uneven tone. Dehydration (poor sleep, low water intake, dry climate) flattens the dewy quality. Sun exposure damages the cellular structure that produces the even-light-reflectivity.

Less obvious but real: harsh cleansing surfactants, alcohol-based 'toners' (still common in Western drugstore products), and skipping sunscreen on cloudy days. These compound slowly but visibly over weeks.

If the five-step daily routine is more than you can realistically commit to, the minimum that produces a visible glass-skin lean is three steps: gentle cleanse, hydrating moisturiser, daily SPF. That's the foundation. Everything else (acids, essences, layered serums) builds on top of those three. Skipping the foundation and trying to add the advanced steps does not work; consistency on the basics beats variety on the actives.

The Skincare Glow reading reads your current skin across four zones and recommends a routine framework tuned to what your skin is actually doing right now. If your skin is dehydrated and dull, the recommendation will prioritise hydration. If oily and breakout-prone, the recommendation will be different. Glass skin is a target; the route there depends on where you are starting.