The process of applying hair with a keratin-based bond is known as:

The process of applying hair with a keratin-based bond is referred to as fusion bonding, which involves using heat to melt a keratin adhesive that holds the extensions in place. This method allows for a secure attachment to the natural hair strands. The keratin bond is designed to be strong yet flexible, mimicking the natural texture and movement of hair, which makes it a popular choice for long-lasting extensions.

In contrast, other methods mentioned have distinct characteristics: tape extensions involve adhesive strips that stick to the hair rather than using heat, weaving utilizes a weft of hair that is sewn into braided sections of natural hair, and micro-linking involves attaching extensions using small beads or links without heat or glue. Each method has its specific application and benefits, but for keratin-based bonding, fusion bonding is the appropriate term.