A blow dryer with a cold setting, also known as a cool shot button, is designed to blow cool air instead of hot air. The cool setting is useful for various reasons, including setting hairstyles, reducing frizz, and providing relief from the heat when blow drying for an extended period. Here's how the cold setting works:
Heating Element: Like most hair dryers, a blow dryer with a cold setting has a heating element that heats up the air as it passes through. This heating element is responsible for producing the hot air used during typical drying.
Temperature Control: When you switch the blow dryer to the cold setting, a mechanism within the dryer adjusts the temperature of the air being blown. It diverts the air away from the heating element, preventing it from being heated to the high temperatures used in the hot setting.
Cool Air: By redirecting the airflow away from the heating element, the blow dryer delivers room temperature or slightly cooler air to your hair. This cool air helps to set your hairstyle, reduce frizz, and provide a refreshing breeze when you need a break from the heat of the hot setting.
Cool Shot Button: In some blow dryers, the cold setting is activated by a cool shot button. When you press and hold this button, the airflow remains cool as long as you keep the button pressed. This feature allows you to apply a burst of cool air precisely where you need it to lock in your style or provide additional cooling.
Using the cold setting is particularly beneficial when you've almost finished blow drying your hair with hot air. By using the cool shot button or switching to the cold setting for the last few moments, you can help set your hairstyle and make it last longer.
It's important to remember that the cold setting on a blow dryer does not mean the air is icy cold. Instead, it's a moderate, room-temperature airflow that offers a contrast to the high temperatures used during regular blow drying. This feature is considered essential for most modern hair dryers, as it allows for more versatility and better hair care.