Is It Necessary to Use a Razor Before Every Laser?

Yes, it is generally recommended to remove hair with a razor before laser epilation and may be a mandatory practice for some laser clinics. There are several reasons for this:

Reasons to Use a Razor Before Laser Epilation:
Hair Should Not Be on the Surface for the Laser to Be Effective:

Laser targets the melanin (pigment) content of the hair. If the hair is long and on the surface, the laser light burns the top of the hair, which reduces the efficiency of the procedure.
The root of the hair is the area where the laser light can effectively target, so it is necessary for the hair not to protrude from the skin.
Protecting the Skin:

Long hairs can cause the laser beams to get too close to the skin and cause burns or irritation on the skin. Short hairs removed with a razor protect the skin.
Directing the Laser to the Right Target:

When the hair is shortened, the effect of the laser is directed directly to the hair roots. This provides a more efficient and safe procedure.
Alternatives Other Than Razor Use:
Methods such as waxing, tweezing and epilator are generally not recommended before laser hair removal. These methods can reduce the effectiveness of the laser because they remove the hair from the root, because the laser targets the hair root and if the root is completely removed, the laser cannot effectively remove the hair.

Skin cleansing and razor removal are necessary for the procedure to be performed safely and effectively.