Rehair

Rehair is a term used to describe the process of replacing the hair on a musical instrument, most commonly a bow used for stringed instruments like the violin, viola, cello, or double bass. Over time, the hair on a bow becomes worn, dirty, or brittle, losing its ability to grip the strings effectively. This deterioration can affect the sound quality and playability of the instrument.

The rehairing process involves carefully removing the old hair and then weaving new hair into the frog and tip of the bow. Typically, hairs from a horse's tail are used, with the length and quality of the hair being important factors. The number of hairs used can vary depending on the bow and the desired tension. After the new hair is inserted, it is tightened to the correct tension for optimal performance. This tension is crucial for producing a clear and controlled tone.

Professional musicians often have their bows rehaired periodically to maintain their instruments' optimal condition. The frequency of rehairing depends on how often the bow is played and the intensity of its use. A skilled luthier or bow maker typically performs this specialized service. They possess the expertise and tools necessary to ensure the rehair is done correctly, preserving the bow's integrity and playability. Inadequate rehairing can negatively impact the bow's balance and responsiveness.