Which two tests are commonly performed before a color service to assess safety?

Which two tests are commonly performed before a color service to assess safety?

• A. Predisposition Test and Patch Test
• B. Only Predisposition Test
• C. Only Patch Test
• D. Neither

Answer: (A)

Before applying color, it’s essential to screen for potential allergies to hair-dye ingredients. The predisposition test checks for a general tendency to react to common color components by applying a tiny amount to the skin and watching for a reaction over about 24 to 48 hours. The patch test takes it a step further by using the actual color product (or a diluted form of it) on a small skin area to see whether that specific formula will cause a reaction, also observed for 24 to 48 hours. Using both helps identify broad sensitivity and compatibility with the exact product you intend to use, reducing the risk of a reaction during the service. If any redness, itching, or swelling appears, the color service should be postponed.

Before applying color, it’s essential to screen for potential allergies to hair-dye ingredients. The predisposition test checks for a general tendency to react to common color components by applying a tiny amount to the skin and watching for a reaction over about 24 to 48 hours. The patch test takes it a step further by using the actual color product (or a diluted form of it) on a small skin area to see whether that specific formula will cause a reaction, also observed for 24 to 48 hours. Using both helps identify broad sensitivity and compatibility with the exact product you intend to use, reducing the risk of a reaction during the service. If any redness, itching, or swelling appears, the color service should be postponed.