What technique is used to add length to hair during hair extensions?

The technique known as bonding is commonly used to add length to hair through extensions. This method involves attaching wefts of hair to natural hair using a special adhesive or bonding glue. The process allows for a more permanent solution compared to other methods, making it suitable for clients looking to maintain longer hair for an extended period.

Bonding provides the advantage of versatility, as it can be used with various hair types and textures. Additionally, it allows for root movement and natural styling, so the extensions blend well with the client's original hair. Proper application and removal techniques are essential to minimize damage to the natural hair and scalp, making this method preferred by some stylists and clients alike.

In contrast, weaving involves a different technique where hair is sewn into braids or cornrows. Interlocking is a method used primarily for attaching extensions but can have different applications and may not be as recognized for adding overall length. Clip-in extensions are temporary solutions that can be easily added or removed but do not provide a permanent lengthening effect like bonding does.