Final answer:
Skin masks containing salicylic acid, benzoyl peroxide, or clays like kaolin or bentonite are effective at slowing oil production, dissolving dead surface cells, and providing a drying effect, which are beneficial for oily or acne-prone skin.
Step-by-step explanation:
An ingredient in masks that can slow oil production, dissolve dead surface cells, and have a drying effect is often found among products with components aimed at treating oily or acne-prone skin. Commonly used ingredients with these properties include salicylic acid, benzoyl peroxide, and clays like kaolin or bentonite. These ingredients help to control excess sebum, providing an oil-reducing benefit. Salicylic acid, for example, is known for its ability to penetrate into pores and dissolve the dead skin cells that can lead to clogged pores, while clays absorb oil and can have a drying effect, which is beneficial for reducing the appearance of oily skin.
Additionally, many moisturizers contain ingredients like emulsifiers and thickening agents, which may contribute to the product's stability and texture but do not directly affect oil production or skin cell turnover. When choosing a mask for oil control, it's important to opt for one that specifically mentions its oil-control or exfoliating benefits and to use it as directed to prevent over-drying of the skin.