Glycerol monothioglycolate is listed as an ingredient associated with which wave type?

• A. Alkaline Wave
• B. Acid Wave Ingredient
• C. Neutral Wave
• D. Chemical Phase

Answer: (B)

Glycerol monothioglycolate is a milder reducing agent used in acid waves. The type of perm solution you’re dealing with depends largely on the reducing agent and the solution’s pH. Alkaline waves rely on ammonium thioglycolate at high pH, which reduces hair bonds more aggressively. Neutral waves use a different, gentler reducer around neutral pH, but not GMTG. GMTG is characteristic of acid waves, which operate at a lower pH and use this reducing agent to break and reform disulfide bonds more softly. That’s why glycerol monothioglycolate is listed as an ingredient associated with acid wave formulations.