What is the difference between a cold wave and a hot wave?

The distinction between cold waves and hot waves lies primarily in their methods of creating curls. Cold waves, also known as alkaline waves, utilize alkaline solutions and do not require the application of heat to achieve curl formation. The chemicals in these solutions work to break down the hair's protein structure, allowing it to take on a new shape. This process is effective for creating long-lasting curls, as the hair is permanently altered during the treatment.

On the other hand, hot waves, or acid waves, rely on the application of heat in conjunction with chemical solutions, which allow for the creation of curls and waves as well. The heat activates the chemicals, helping to set the curls into place. This method typically results in softer, more natural-looking curls and is considered less damaging to the hair in comparison.

Understanding this difference is essential for making informed decisions about the types of perming techniques to use based on hair type and desired outcomes. Cold waves are geared towards more permanent results, while hot waves generally provide flexibility and less chemical exposure.