What type of rod should be used to achieve a uniform curl?

To achieve a uniform curl, using a straight rod is essential. Straight rods create even tension throughout the hair as it is wrapped around the rod, resulting in consistent and balanced curls. This type of rod allows the hair to curl in a uniform manner, as it does not alter the shape of the curl, ensuring that each curl maintains the same size and symmetry.

Other types of rods may produce curls with varying shapes or sizes. For instance, curved rods can create more natural, soft waves or curls that vary in dimension due to their shape. Flexi rods offer versatility in styling but might lead to uneven curl patterns based on how the hair is wrapped, which can create variations in size and tightness of the curls. Spiral rods are designed to create spiral-shaped curls, which inherently results in a different curl formation. Therefore, for achieving specifically uniform curls, the straight rod is the ideal choice due to its capability to maintain consistent curl formation across the hair.