Answer :
Final answer:
The correct mixing for a 1:1 ratio of hair color to developer as per directions is B. 2 oz color to 2 oz developer, which maintains the balance necessary for the proper chemical reaction in permanent hair coloring.
Explanation:
When directions for hair coloring say to mix with a 1:1 ratio, it means that the amount of hair color should be equal to the amount of developer. Therefore, the correct mixing option from the ones provided would be B. 2 oz color to 2 oz developer. This will ensure that the color develops correctly and results in the desired shade.
Permanent hair coloring involves a chemical process that alters the hair's structure and is achieved through a combination of a diamine compound, a coupler, and an oxidant. The 1:1 mixing ratio is essential in balancing the oxidative reaction that leads to the final dye formation, which defines the color after the hair coloring process.
In summary, option B. 2 oz color to 2 oz developer is the correct mixture when using a 1:1 ratio for hair color and developer as prescribed in typical hair coloring instructions.