Hair Undercoat Full Theory (underlyingpigment) क्या है अन्डर्कोट Salonfact

Hey guys in this video i have shared Color Theo ry of Hair Undercoat (underlying Pigment)
guys sorry video main batana bhul gaya tha ki 40vol (4) level lift karega isliye 40vol use kiya kyu ki client ka hair already 4 level ka hain or usey desired shade 8.3 chiye mtlb 4 se 8 level jana hain (4) level lift karna hai 40volume oxydant se kiya isliye i hope aap samajh gaye hoge guyz
this video will helpful for beginner
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