What happens if a pressing comb is too hot when applied to hair?

When a pressing comb is too hot when applied to hair, the primary concern is that hair may be damaged. Hair is made up of a protein called keratin, which can be altered by extreme heat. If the temperature of the pressing comb exceeds the safe threshold, it can lead to several forms of damage, including the weakening of the hair structure, breakage, and split ends. Excessive heat can strip moisture from the hair, leading to dryness and brittleness, which further exacerbates the risk of damage.

The other choices do not adequately address the primary consequence of excessive heat. For instance, while hair drying quicker can be a side effect of heat application, it is not the main focus when discussing the risks associated with a hot pressing comb. Similarly, while hair might exhibit greasiness due to various factors, this is not a direct outcome of using a hot pressing comb. Ultimately, the most critical issue is the potential for damage that can arise from using a comb that is too hot for the hair's health.