research Morphology Analysis of Hair Photoinduced and Chemical Damaged After Treatment with Sappan Wood (Caesalpinia sappan L.) Hair Tonic using SEM
In this study, researchers used scanning electron microscopy to analyze hair damage from 3% hydrogen peroxide and UVB radiation, observing that Caesalpinia sappan hair tonic formulations coated and interacted with the hair cuticle, potentially modifying hair fiber damage.

