Which perms are processed without heat and are also known as cold waves?

Which perms are processed without heat and are also known as cold waves?

• A. Acid perms
• B. Alkaline perms
• C. Neutral perms
• D. Heat perms

Answer: (B)

Cold waves are perms processed at room temperature without applying heat. This is achieved with an alkaline reducing solution (ammonium thioglycolate) that breaks and reshapes disulfide bonds while no external heat is used. After wrapping, a neutralizer re-forms the bonds in the new curl pattern, setting the wave. Acid perms, on the other hand, are typically associated with heat to activate the curl, and heat perms refer to those that require external heating as part of the process. Neutral perms are milder and sometimes marketed as no-heat, but the classic cold wave category is defined by alkaline perms.

Cold waves are perms processed at room temperature without applying heat. This is achieved with an alkaline reducing solution (ammonium thioglycolate) that breaks and reshapes disulfide bonds while no external heat is used. After wrapping, a neutralizer re-forms the bonds in the new curl pattern, setting the wave. Acid perms, on the other hand, are typically associated with heat to activate the curl, and heat perms refer to those that require external heating as part of the process. Neutral perms are milder and sometimes marketed as no-heat, but the classic cold wave category is defined by alkaline perms.