Beveled Ends Technique
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Could you explain a technique that could be used at home?
Be sure to keep the elevation on the section low - no more than 45 degrees - in order to create shallow layering. The higher you elevate the section the longer the layers below the top one will hang and the steeper your layering will become.
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For simple beveling, use a low elevation and keep the hair combed smooth before you cut it. In addition, keep in mind that curly hair can shrink when it dries as much as 4-inches or more, so always use absolutely the minimum amount of tension when holding the hair to prevent ending up with much shorter lengths when the hair is dry.
A good tip is to remember that it takes a LOT more time to re-grow hair that's too short than to shorten hair that's still too long.
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See also:
How to layer long hair
The difference between an beveled and a layered haircut