a teenage girl applies astringent toner to her face using a cotton pad, touching her cheek gently. Her facial expression immediately changes as she feels the tightening sensation on her skin. The astringent causes her skin to visibly contract and tighten, making her face appear more taut. Her eyes widen slightly at the intense pulling sensation across her cheeks and forehead. Her mother stands nearby holding the bottle, nodding approvingly at the skincare routine. A small mirror reflects the girl's surprised but satisfied expression as she experiences the skin-tightening effect. the astringent causing contraction of skin cells and tissues