About 10 minutes. Egg white is good for the skin. Applying egg white to face can tighten skin, control oil, shrink pores and rejuvenate skin. If you apply egg white for a long time, your skin will age slowly.

Extended data:

Egg white contains minerals such as protein, methionine, vitamins, phosphorus, iron, potassium, magnesium, sodium and silicon. Protein amino acid composition in egg white is the closest to human body, and its biological value is also the highest. Egg white also has the functions of clearing away heat and toxic materials, diminishing inflammation and protecting skin, and enhancing skin immune function.

Caution: Do not let the protein liquid remain on the skin. Wash with warm water at least 3 times, or clean with clean cotton. When applying a mask, especially when it contains protein, it is not appropriate to speak or make any expression, and the skin should be relaxed. At the same time, each application should last no more than 5 minutes and no more than 3 times a week. If you feel itchy or red and swollen during application, you should immediately stop and thoroughly clean your face, and apply vaseline to calm your skin.

References:

Egg white mask _ Baidu Encyclopedia