PSI Cosmetology Practice Exam

What is the main ingredient in traditional waving lotions?

1. Gelatin

2. Karaya gum

3. Polymer resin

4. Aloe vera

The correct answer is: Karaya gum

The main ingredient in traditional waving lotions is karaya gum. This natural gum, derived from the Sterculia tragacantha tree, has long been used in the cosmetology industry for its unique properties. Karaya gum acts as a thickening agent and a binding agent, which helps in creating the hold necessary for waving and styling hair. Its ability to provide a flexible hold makes it especially suitable for creating curls and waves, which is why it has been favored in waving lotions. In contrast, gelatin is more commonly associated with food and other applications but does not provide the same benefits when used in hair products. Polymer resin is often used in modern styling products for its strong hold and ability to withstand humidity, but it is not the primary component in traditional waving lotions. Aloe vera, while known for its moisturizing and soothing properties, does not have the same textural or holding qualities necessary for waving hair. Thus, the use of karaya gum in traditional waving lotions highlights its effectiveness in achieving the desired styling results.