Here's why:
* Disruption of Curl Pattern: Thinning shears remove bulk by cutting a percentage of the hair strands at different lengths. This can disrupt the natural curl pattern, leading to frizz, uneven curls, and a less defined shape.
* Frizz: The shorter, broken hairs created by thinning shears can stick out and cause frizz, which is the opposite of what most people with curly hair want.
* Unpredictable Results: It's difficult to predict how thinning shears will affect curly hair because the curls spring up differently when shorter hairs are interspersed.
* Damage: Thinning shears, if used incorrectly, can damage the hair shaft, leading to breakage and split ends.
When Thinning Shears Can Be Used Carefully (and sparingly)
There are exceptions, and a very skilled stylist with extensive curly hair experience *might* use thinning shears in specific situations:
* Extreme Density: In extremely dense, thick curly hair, very careful and minimal use of thinning shears might be considered to reduce bulk, but it's a last resort and requires a deep understanding of how the hair will react.
* Hairline Issues: Sometimes, very light thinning can help blend the hairline.
* Specific Styling Goals: Extremely rarely, if a client wants a very specific, unique look, a tiny amount of thinning might be used.
Instead of thinning shears, curly hair is best cut with:
* Scissors or shears: Straight scissors for creating shape, layers, and removing length.
* Razor (very carefully): Some stylists use a razor to create soft layers, but it requires skill and can damage some types of curly hair.
* Texturizing techniques using scissors: Point cutting, slide cutting, and other scissor techniques can remove bulk and create movement without the potential damage of thinning shears.
The bottom line: Thinning shears are generally a tool to avoid on curly hair unless used by a highly skilled stylist with a deep understanding of curly hair texture and how to use them very carefully and sparingly. It's always best to err on the side of caution and opt for alternative techniques that won't disrupt the curl pattern or cause frizz.