What is the correct ratio of bleach to developer in a typical hair bleaching process?

In the hair bleaching process, using a 1:2 ratio of bleach to developer is common. This means that for every one part of bleach, two parts of developer are used. This ratio is critical because it provides enough lift and allows the bleach to process effectively.

When mixed in this ratio, the developer activates the bleach, creating the necessary chemical reaction to lift the hair color. It also helps to ensure even application and avoids over-processing, which can lead to damage.

Using a 1:1 ratio, which might be too concentrated, could result in a harsher application, potentially damaging the hair. A 1:3 or 1:4 ratio would dilute the bleach too much, compromising its ability to lighten the hair adequately. Therefore, the 1:2 ratio strikes the right balance for achieving optimal results while maintaining hair integrity during the bleaching process.