Which characteristic is crucial for tweezers used in isolation?

The curvature of the tips is a crucial characteristic for tweezers used in isolation because it significantly affects the precision and ease with which individual lashes can be separated and handled during the application process. Curved tips allow for better access to the natural lashes and enable the lash artist to isolate a single lash more effectively, minimizing the risk of grabbing multiple lashes at once. This is particularly important for achieving clean and precise results in lash extensions, as it ensures that each extension is applied to a single natural lash, contributing to a fuller and more beautiful finished look.

In contrast, lightweight material can enhance comfort during extended use but doesn't directly impact the isolating capability. Flexible length may allow for versatility in use, but it is the curvature that provides the necessary control for isolation. Color coding may be useful for organizing tools but does not influence the technical ability to isolate lashes. Therefore, while other characteristics can contribute to the overall experience, the curvature of the tips remains the most critical feature for effective lash isolation.