Which type of haircutting technique involves using a straight-edge razor?

The technique that involves using a straight-edge razor is texturizing. This method is employed to create softer edges and add texture to the haircut. By gently sliding the razor along the hair strands, barbers can remove weight and create movement, resulting in a more natural and less structured appearance.

Texturizing with a razor is particularly effective for achieving feathered looks and enhancing layers without creating harsh lines. The straight-edge razor's ability to cut hair in a manner that allows for variability in length contributes to blended and seamless styles.

In contrast, layering typically involves using shears to create different lengths within the haircut, blunt cutting creates a straight edge with minimal variation in length, and point cutting is a technique used to soften the ends of the hair with scissors, none of which primarily utilize a straight-edge razor in their fundamental approach.