What is another term for the 1:20 test?

What is another term for the 1:20 test?

• A. Compatibility test
• B. Incompatibility test
• C. Porosity test
• D. Elasticity test

Answer: (B)

This test is about checking how two chemical products will interact with each other during a service. The 1:20 test uses a small amount of product diluted in a liquid to see if there’s any adverse reaction when the chemicals meet. If you notice signs like unexpected changes, damage, or unusual reaction, that indicates incompatibility, so you wouldn’t proceed with the full application. The idea isn’t about how the hair itself behaves (porosity or elasticity), but about whether the products can safely work together. While a compatibility test would imply a positive confirmation of safe use, the 1:20 procedure is specifically used to uncover potential incompatibility, which is why it’s called an incompatibility test.

This test is about checking how two chemical products will interact with each other during a service. The 1:20 test uses a small amount of product diluted in a liquid to see if there’s any adverse reaction when the chemicals meet. If you notice signs like unexpected changes, damage, or unusual reaction, that indicates incompatibility, so you wouldn’t proceed with the full application. The idea isn’t about how the hair itself behaves (porosity or elasticity), but about whether the products can safely work together. While a compatibility test would imply a positive confirmation of safe use, the 1:20 procedure is specifically used to uncover potential incompatibility, which is why it’s called an incompatibility test.