Final answer:
A toner is used to rebalance the skin's pH after cleansing. It should have slight acidity and be alcohol-free to avoid skin irritation. A good toner restores the skin's natural pH and provides a pleasant sensory experience.
Step-by-step explanation:
A product used after cleansing to rebalance the pH of skin is typically referred to as a toner. Toners are formulated to restore the skin's natural pH balance, which can be disrupted during the washing process. After cleansing, the skin can often be slightly alkaline, and a good toner will have a slight acidity (pH less than 7) to counteract this, providing a rebalancing effect.
Moreover, it's important to use only alcohol-free products and avoid harsh astringents or exfoliants. These products can irritate the skin, especially after cleansing when the skin barrier is more vulnerable. Instead, look for toners or aftershave that provide a pleasurable sensory experience, such as a pleasing foam or a pleasant fragrance, but always ensure they have low toxicity and good biodegradability.