Pre-perm test curl tutorial
This tutorial will guide you through the basics of performing a pre-perm test curl. When handling fragile, porous hair or hair with a doubtful history or doubtful previous chemical treatments, it is advisable to perform a pre-perm test curl. The pre-perm test curl will help you determine if there will be any potential problems when carrying out the full perming service.
Members can also download our Pre-perm Test Curl fact sheet.