Which curl reformation service can be performed on hair previously treated with sodium hydroxide products?

In the context of curl reformation services, it is important to recognize the chemical processes involved and how they interact with existing hair treatments. Sodium hydroxide is a strong alkaline chemical often used in relaxers that break down the disulfide bonds in hair, allowing for straightening. Once hair is treated with sodium hydroxide, it becomes altered in its structure and can be significantly weakened.

Curl reformation services, which typically involve the use of milder chemicals to create curls or waves, require healthy hair that is capable of handling the different chemical processes involved. Performing either a virgin or retouch service on hair that has been treated with sodium hydroxide is not advisable because the hair's integrity may already be compromised from the previous treatment.

Virgin services are meant for hair that has had no prior chemical applications, while retouch services are used on hair where some chemical processing has occurred, but the hair must still have enough strength and health to endure additional chemical processes. Since hair treated with sodium hydroxide is not ideal for further chemical applications related to curl reformation, it is determined that neither the virgin nor the retouch service would be appropriate in this case. This understanding leads to the conclusion that both services are not suitable for hair that has previously been treated with