NIC Barber Written (Theory) ExamHair Care ServicesMedium
A barber is performing a hair coloring service. The client has 50% gray hair and desires a permanent hair color that will provide complete coverage. Which mixing ratio of permanent hair color to developer is generally recommended to achieve optimal gray coverage?
- A2 parts color to 1 part developer
- B1 part color to 1/2 part developer
- C1 part color to 1 part developer
- D1 part color to 2 parts developer
Show answer & explanationAnswer & explanation
Correct answer: C. 1 part color to 1 part developer
For standard permanent hair color formulations, especially when covering gray hair, a 1:1 mixing ratio of color to developer is typically recommended. This ensures sufficient pigment for full gray coverage and proper lift/deposit.
Why the other options are wrong
- A. A 2:1 ratio would result in a very thick mixture with insufficient developer, leading to poor color development and uneven results.
- B. A 1:1/2 ratio (or 2:1 color to developer) would be too concentrated in color and lack enough developer for proper oxidation and gray coverage.
- D. A 1:2 ratio is often used for lighter, more translucent results or for high-lift tints, not ideal for full gray coverage.
Permanent Hair Color Mixing Ratio (1:1)
The standard mixing ratio for most permanent hair colors, combining one part hair color formula with one part developer, typically 20 volume, to achieve optimal gray coverage and desired color results.
- Standard ratio for permanent color
- Ensures balanced pigment and developer
- Essential for optimal gray coverage
- Most common with 20 volume developer
Memory trick: Equal parts color and developer, for gray's perfect cover.