PSI Cosmetology Theory Exam with correct answers 100% 2026

PSI Cosmetology Theory Exam with correct answers 100% 2026 Soft Water/ Rain water - Correct Answer Best for shampooing and allows shampoo to lather freely Hard Water - Correct Answer Minerals that lessen the ability of the shampoo to lather Purified water/Deionized water - Correct Answer Main ingredient in shampoo Surfactant - Correct Answer has two ends the HYDROPHILIC HEAD and LIPOPHILIC TAIL Hydrophilic Head - Correct Answer Attracted to water Lipophilic Tail - Correct Answer Attracted to dirts and oils Acid Balanced Shampoo - Correct Answer pH of 4.5-5.5 Jheri Redding - Correct Answer first to introduce pH balanced shampoo in the 1960s Clarifying Shampoo - Correct Answer acidic base to cut through buildup on the hair strand Humectants - Correct Answer Most conditioners carry this. Promote retention of moisture Instant conditioners - Correct Answer remain on the hair 1-5 minutes Protein Conditoners - Correct Answer brown liquids and penetrate into the cortex to temporarily improve porosity and increase elasticity Infraed Lamps - Correct Answer may be used with hair treatments and scalp tonics for 5 minutes High Frequency Unit - Correct Answer used to normalize oily scalp conditioners