Follow the recommended mask pack use time (10-20 minutes).

The habit of leaving the sheet mask on until it dries completely out of fear of wasting it can actually be a fatal mistake that can ruin your skin.

The principle of a mask pack is that the sheet seals the skin surface to increase the absorption rate of effective ingredients.
If you leave it on for a long time, exceeding the recommended time of 10 to 20 minutes, the sheet will dry out and draw in moisture from the surroundings, a phenomenon called 'reverse osmosis'.

In other words, when the essence contained in the pack begins to dry, the moisture that was stored in the skin is taken back to the sheet, causing severe dryness and fine wrinkles.

On the other hand, if you leave it on for too short a time than recommended, the highly concentrated essence will not have enough time to penetrate deep into the stratum corneum, so the product will not be effective and will just linger.

Therefore, it is standard to remove the mask pack while the sheet is still moist.
The smartest way to maximize moisture retention is to lightly pat any remaining essence on the skin immediately after removing it to help it absorb, and then finish with a protective layer of moisturizing cream.