What can cause uneven curls after a perm?

Uneven curls after a perm can result from uneven product application or varying hair porosity. When the perm solution is not applied uniformly, certain areas of the hair may not absorb the chemical treatment effectively, leading to inconsistent curl formation. Additionally, different hair porosities can react unpredictably to the perm solution; for instance, highly porous hair may absorb more product and curl more tightly, while less porous sections may not respond as well, resulting in uneven curls. Proper technique in applying the perm solution and ensuring uniformity in hair porosity before starting the treatment are crucial for achieving consistent results.