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What is the size of the curl determined by?
The first part of any perm is the physical change caused by wrapping the hair on the rods. The second part involves the chemical changes caused by the perm solution and the neutralizer. In permanent waving, the size and type of curl is determined by the size of the rods and the type of wrapping method.
What of the perm rod determines the size of the curl?
In permanent waving, the size of the rod determines the size of the curl. The shape and type of curl are determined by the shape and type of the rod and the wrapping method. Concave rods are the most common type of perm rods. They have a smaller diameter in the center that increases to a larger diameter on the ends.
Is the natural pH of hair between 4.5 and 5.5 true?
True, the natural pH of hair is between 4.5 and 5.5. The pH scale measures the acidity or alkalinity of a substance, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. Hair and the scalp have a slightly acidic natural pH level, typically falling within the range of 4.5 to 5.5.
What determines the size of the curl in a perm?
In permanent waving, the size of the rod determines the size of the curl. In permanent waving, the size of the rod determines the size of the curl. On-base placement minimizes stress and tension on the hair. Alkaline waves are also known as cold waves.
What proportion is curly hair?
Human hair comes with all sorts of colors, textures and shapes. Notably, African hair is more coiled and dry; Asian hair is straighter and thicker; and Caucasian hair is somewhere in between with around 45% having straight hair, 40% having wavy hair, and 15% having curly hair.