In my mind, the blend is the best and only method to use on African American skin - HF can cause dark pigmentation if the hair requires a strong HF current.
Insertions are different on most African American women than on other nationalities.
African American hair has a curved follicle which requires special consideration to be inserted into properly. Introduce the probe on the underside of this hair at the same angle at which other emerging terminal hairs are growing. PUSH PAST THE TISSUE OBSTRUCTION (Most African American skin has an extra layer of fat- very important) and continue downward about half again as far. When the hair releases, check it for depth and continue using the depth as your guide. Be sure to use correct diameter of probe that equals that of the widest part of the hair shaft.
I will send pictures of this method if someone can tell me how to do this - I found a link for a webpage but not a method for cut & paste for images.
I’ve found when some African American customers are a mix of Hispanic/Caucasian,etc. that their follicles may not be as curved or there is will be a mixture of both curved & straight follicles on the skin surface. You will need to treat each hair accordingly. The most difficult hair releases VERY easily when the insertions are correct !!