Henna spa is a complete step by step beauty treatment regime that tints your eyebrows, eyelashes and hair. While coloring hair with henna has been an age old remedy for covering grey hair but eyebrow and eyelash coloring with henna is new. When it comes to coloring brows and lashes you have to be extremely cautious as eyes are very delicate. This is why henna has gained popularity as coloring technique for delicate parts like eyebrows and eyelashes. Henna spa lasts from four weeks to two months depending upon the type and quality of henna used. For example NMP Udhyogâs henna for eyebrow has high concentrate of pure henna leaves (Lawsonia inermis) that gives strong tint which easily lasts for months. The higher the concentration of Lawsonia inermis in henna the stronger and long lasting the color would be. NMP Udhyogâs henna is made from grounding the fresh and new Lawsonia inermis leaves. This is why the resulting henna is of high quality and supreme color pay off. The Body Art Quality Henna can be used to even permanently color the hair.