Round Lab
Vita Niacinamide Dark Spot Serum Mask$11.76COSRX
Poreless Clarifying Charcoal Mask Pink
A color-changing clay mask: kaolin and diatomaceous earth with calamine, charcoal capsules and a touch of salicylic acid.
No reviews yet- Ships from California or direct from Korea
- Korean barcode and batch code intact
- Suited to
- TexturedCongestedDryDehydrated
- Helps with
- Rough surface textureDehydrationExcess oilEarly environmental damage
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VT Reedle Shot 700 2-Step MaskVT Cosmetics
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How it works
A clay mask works by absorbing: it holds surface oil and debris while it sits, and takes them off when it is rinsed. This one carries kaolin, silica and diatomaceous earth as the absorbing side, with charcoal powder and calamine on the same list. It goes on after cleansing, on dry skin, and the rest of the routine waits until it has come off. Skin that looks shiny and congested across the nose and chin is the case it fits, and using it on those areas alone is a fair way to go. Once or twice a week, with a full hydrating routine straight afterwards.
Key benefits
- Kaolin sits fourth on the list with silica and diatomaceous earth for sebum
- Calamine gives the pink shade and its classic soothing feel
- Charcoal capsules burst as you massage, deepening the cleanse
- Salicylic acid finishes the clarifying story
Inside the formula
Inside the formula
COSRX Poreless Clarifying Charcoal Mask Pink
Is charcoal really doing the pore-clearing work in this mask, or is it mostly kaolin?
Kaolin is fourth on the ingredient list and diatomaceous earth follows shortly after, both well ahead of charcoal powder, which sits in the seventeenth position. That order means kaolin and diatomaceous earth are the primary absorbent clays here, with charcoal present but contributing far less by concentration than its prominence in the name suggests.
How much salicylic acid is actually in this mask?
Salicylic acid is the very last ingredient on the list, which is the lowest possible position an ingredient can occupy. That placement means any exfoliating contribution is minimal, so this mask should be treated as a clay-based pore mask first rather than a BHA treatment.
Will this mask feel drying like some clay masks do?
Three separate hyaluronate forms, hyaluronic acid, hydrolyzed hyaluronic acid, and sodium hyaluronate, appear in the back half of the ingredient list specifically to offset the drying tendency of kaolin and diatomaceous earth. Most clay-mask dryness comes from leaving the mask on until it fully hardens and cracks, so removing it while still slightly damp helps as well.
What is calamine doing in a charcoal clay mask?
Calamine sits mid-list among the clay and absorbent ingredients and is a common addition in Korean clay masks for a mattifying, slightly soothing finish. It works alongside kaolin and diatomaceous earth rather than replacing either as the primary clay.
How often should a clay mask like this be used?
Clay-based masks with kaolin and diatomaceous earth as the leading ingredients are typically used once or twice a week rather than daily, since frequent use of an absorbent clay can leave skin feeling stripped. Rinse before the mask fully hardens on the face to avoid unnecessary tugging on removal.
Not on the ingredient list below: fragrance or parfum, denatured or SD alcohol, essential oils, silicones, parabens, sulfate surfactants and mineral oil or petrolatum.
Full INCI (35): Water, Silica, Propanediol, Kaolin, Glycerin, Diatomaceous Earth, 1,2-Hexanediol, Butylene Glycol, Camellia Sinensis Seed Extract, Betaine, Carbomer, Tromethamine, Hydroxyacetophenone, Titanium Dioxide, Ammonium Acryloyldimethyltaurate/VP Copolymer, Cellulose, Charcoal Powder, Calamine, Cellulose Gum, Xanthan Gum, Silica Dimethyl Silylate, Disodium EDTA, Ethylhexylglycerin, Ethylcellulose, Gardenia Florida Fruit Extract, Dextrin, Lauric Acid, Zea Mays (Corn) Starch, Aluminum Hydroxide, Mannitol, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Polyglyceryl-10 Stearate, Salicylic Acid
Ingredient list read from cosrx.com on 18 August 2026.
34 of 35 explained
- Water solvent
- Water is the base almost every serum, toner and cream is built on. It dissolves the water-loving ingredients and sets how light the finished texture feels. On an INCI list it is usually first, which only means it is the largest single ingredient by weight.
- Silica absorbent
- Silica is finely milled mineral, essentially very pure sand. It absorbs oil, stops powders clumping and soft-focuses the look of pores and fine lines.
- Propanediol humectant
- Propanediol is a plant-derived glycol used in place of propylene glycol. It hydrates, carries actives into solution, and gives a lighter, less sticky slip than glycerin at the same strength.
- Kaolin absorbent
- Kaolin is white clay, the mildest of the cosmetic clays. It absorbs oil and lifts loose debris from the surface without stripping, which is why it is the clay used on drier skin.
- Glycerin humectant
- Glycerin is the most used humectant in skincare. It draws water into the outer layer of skin and holds it there, and it is one of the very few ingredients whose hydrating effect is settled science rather than marketing. Higher amounts feel tacky, which is why it is usually blended.
- Diatomaceous Earth absorbent
- Diatomaceous Earth is fossilised algae shells, which are almost pure silica. It absorbs oil and works as a very fine polishing grain.
- 1,2-Hexanediol humectant
- 1,2-Hexanediol is a glycol used for two reasons: it holds water like glycerin, and it makes a formula harder for microbes to live in, so less traditional preservative is needed. Korean formulas use it heavily for that second reason.
- Butylene Glycol humectant
- Butylene Glycol is a small glycol that does two jobs at once: it holds water in the top layer of skin and it dissolves plant extracts and actives that plain water cannot. It also thins a formula, which is why watery Korean essences lean on it.
- Camellia Sinensis Seed Extract plant extract
- Green tea seed extract, from the seed rather than the leaf, so it carries saponins and sterols instead of catechins. It is used as a conditioning extract.
- Betaine humectant
- Betaine is a sugar-beet-derived humectant that cells use to hold water. In a formula it hydrates and takes the edge off cleansers and acids, which is why it often appears alongside them.
- Carbomer thickener
- Carbomer is a synthetic polymer that only gels once a base neutralises it, which is why arginine or tromethamine sits nearby on the list. It gives the clear, non-stringy gel texture a xanthan formula cannot reach.
- Tromethamine pH adjuster
- Tromethamine neutralises acidic thickeners such as carbomer so they gel, and holds a formula near skin-friendly pH. It is used at a fraction of a percent.
22 more explained
- Hydroxyacetophenone preservative booster
- Hydroxyacetophenone is an antioxidant that also strengthens a preservative system, so a formula needs less traditional preservative. Korean formulas pair it with 1,2-hexanediol constantly.
- Ammonium Acryloyldimethyltaurate/VP Copolymer thickener
- This is a synthetic thickener that gels quickly and holds an emulsion stable across a wide pH range. It gives a light, non-tacky body.
- Cellulose absorbent
- Cellulose is plant fibre. In a formula it thickens, absorbs oil and, in a sheet mask, is often the fabric itself.
- Charcoal Powder absorbent
- Activated charcoal, a very porous carbon powder. Its surface binds oil and pigment, and it is what makes a mask or cleanser black.
- Calamine absorbent
- Calamine is a mineral blend of zinc oxide with a trace of iron oxide, which is where its pale pink colour comes from. In a formula it is an absorbent mineral powder.
- Cellulose Gum thickener
- Cellulose Gum is plant cellulose modified to dissolve in water. It thickens, holds particles in suspension and gives a smooth, slippery body.
- Xanthan Gum thickener
- Xanthan Gum is a polysaccharide made by fermenting sugar. It thickens a watery formula into a gel and holds the whole thing in suspension so nothing separates. Too much of it and a serum turns stringy, which is why it appears in fractions of a percent.
- Silica Dimethyl Silylate absorbent
- Silica Dimethyl Silylate is silica with a silicone surface coating. It absorbs oil, thickens and stops powders clumping.
- Disodium EDTA chelator
- EDTA is a chelator: it locks up trace metal ions from water and packaging that would otherwise turn a formula cloudy, off-colour or rancid. It does nothing to skin and appears at a fraction of a percent.
- Ethylhexylglycerin preservative booster
- Ethylhexylglycerin softens skin and boosts a preservative system, which is why it is nearly always sitting beside phenoxyethanol or 1,2-hexanediol. It also cuts down the odour bacteria produce, so it turns up in deodorising products.
- Ethylcellulose film former
- Modified plant cellulose that dissolves in solvents rather than water. It dries to a water-resistant film, so it is used for staying power.
- Gardenia Florida Fruit Extract plant extract
- Gardenia Fruit Extract is the traditional East Asian yellow dye plant. In skincare it is used as an antioxidant extract, and it can tint a formula.
- Dextrin thickener
- Dextrin is a starch fragment used to thicken and to give a formula a light, powdery finish. It is also a common carrier for powdered extracts.
- Lauric Acid fatty acid
- Lauric Acid is the coconut fatty acid that gives soap-style cleansers their dense foam. It is not well suited to blemish-prone skin at high levels.
- Zea Mays (Corn) Starch absorbent
- Corn Starch absorbs oil and moisture and gives a soft, matte finish. It also thickens a formula.
- Aluminum Hydroxide absorbent
- Aluminum Hydroxide is a mineral powder used to coat pigments so they disperse evenly, and to absorb a little oil. It is not an antiperspirant salt.
- Mannitol humectant
- Mannitol is a sugar alcohol used as a humectant and antioxidant. It hydrates and helps stabilise the rest of the formula against oxidation.
- Hyaluronic Acid humectant
- Hyaluronic Acid is a sugar chain the body already makes, and one gram of it can hold several litres of water. In a formula it is a humectant that pulls water to the surface of skin and holds it in a film, which is what makes skin look plumper while it is there.
- Hydrolyzed Hyaluronic Acid humectant
- Hydrolyzed Hyaluronic Acid is hyaluronic acid cut into much shorter fragments. The smaller the fragment, the further into the outer layer it can settle, which is why serums stack several sizes together instead of using one.
- Sodium Hyaluronate humectant
- Sodium Hyaluronate is the salt of hyaluronic acid, and it is what most products labelled hyaluronic actually contain. The salt dissolves more readily and the molecule is smaller, so it sits in the outer layer of skin rather than only on top of it.
- Polyglyceryl-10 Stearate emulsifier
- Polyglyceryl-10 Stearate is a mild sugar-derived emulsifier that holds oil into water and thickens slightly.
- Salicylic Acid exfoliant
- Salicylic Acid is a BHA, and the only common exfoliant that is oil soluble, so it can work inside a pore rather than only on the surface. It loosens the dead cells that block pores and is used for the look of congested, oily skin.
- EAN (barcode)
- 8809598453302
- Made in
- Republic of Korea
- Category
- Mask
- Actives
- Green Tea, Hyaluronic Acid, Salicylic Acid, Sodium Hyaluronate
- Ships from
- California or Korea
Orders ship from California or direct from Korea with tracked delivery to your door, and both routes carry the same Korean-market release. Shipping is free on orders of $100 or more. Returns are accepted for 30 days, by mail.
We split shipments free, so one out-of-stock item never holds up the rest of your order.
Where this unit came from
- 1Seoul
Bought as Korean-market stock - 2Barcode
Listed against the Korean barcode on its box - 3California or Korea
Ships to you from either, as the same Korean-market release
We stock the version of a formula that is sold in Korea, not the release a brand prepares for another market under the same name.
Every unit keeps its original barcode and batch code intact, so the unit in your hands can be checked against the brand’s own records.
Every order ships from California or direct from Korea, and returns run for 30 days.
Every claim on this page traces to the unit in the box, the barcode, the batch code and the price you can read for yourself.
How to use
- Use the Poreless Clarifying Charcoal Mask after cleansing, on dry skin, in the evening.
- Spread an even layer over the face, or over the congested areas alone, and massage lightly as it settles.
- Rinse it off once the color has lightened, then follow with toner, serum and moisturizer the same evening.
- Once or twice a week. Do not let it dry to a crack; a clay mask taken past that point leaves skin tight rather than clean.
Worth knowing
- This formula carries an active acid, so pairing it with another exfoliant in the same routine is worth spacing out.
Reviews
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COSRX Poreless Clarifying Charcoal Mask Pink
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COSRX
Pink charcoal clay mask with Kaolin, Calamine and Salicylic Acid.
Verify your unit when it arrives
Verify your unit when it arrives
Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.
COSRX verifies units itself. Find the verification page on cosrx.com and enter the batch number and expiration date printed on your unit. Read them off the package rather than from us, which is the point.
Source: COSRX FAQ
On the unit itself
- The Korean-market barcode, unaltered from the retail package.
- The manufacturer’s batch code, exactly as the maker printed it.
정품Genuine article, Korean-market stock
What professionals say
What professionals say
What skin-care professionals say about skin care, quoted from the medical sources linked beside each.
Your skin barrier is basically your outer layer of the skin.
Melissa Piliang, MDDermatologist, Cleveland Clinic Pretty much every step of a Korean skin care routine is going to have some component of hydration.
Alok Vij, MDDermatologist, Cleveland Clinic
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