| A | B |
|---|
| Acid balanced waves | they have a pH between 7.8 and 8.2 and use glyceryl monthioglycolate as the primary reducing agent. They process at room temperature, and do not require the added heat of a hair dryer. They process more quickly, and produce firmer curls. |
| Alkaline wave or cold waves | have a pH between 9.0 and 9.6, they use ammonium thioglycolate as the reducing agent and process at room temperature. |
| Amino acids | are units joined together, end to end by peptide bonds to form the polypeptide chains that comprise proteins in hair. |
| Ammonia free waves | use alkanolamines instead of ammonia, and care popular because of their low odor. |
| Ammonium thioglycolate | is the active ingredient or reducing agent in alkaline permanents. |
| Protective base cream | is oily cream used to protect the skin and scalp during hair relaxing. |
| Base control | is the position of the rod in relation to its base section, determined by the angle at which the hair is wrapped. |
| Base direction | is the angle at which the rod is positioned on the head; (horizontally, vertically, or diagonally) also the directional pattern in which the hair is wrapped. |
| Base Placement | is the position of the rod in relation to its base section, and is determined by the angle at which the hair is wrapped. Rods can be wrapped on base, half off-base, or off base. |
| Base relaxers | are relaxers that require the application of protective base cream to the entire scalp prior to the application of the relaxers. |
| Base Sections | are subsections of panels into which hair is divided for perm wrapping; one rod is normally placed on each base section. |
| Basic perm wrap | is a perm wrap in which all the rods within a panel move in the same direction and are positioned on equal size bases; all base sections are horizontal, with the same length and width as the perm rod. |
| Bookend wrap | perm wrap in which one end paper is folded in half over the hair ends like an envelope. |
| Bricklay perm wrap | perm wrap similar to actual technique of bricklaying; base sections are offset from each other row by row. |
| Chemical hair relaxing | rearranges the structure of curly hair into a straighter or smoother form. |
| Chemical texture services | hair services that cause a chemical change that permanently alters the natural wave pattern of the hair. |
| Concave rods | perm rods that have a smaller diameter in the center that increases to a larger diameter on the ends. |
| Cortex | is the middle layer of the hair, located directly beneath the cuticle layer. |
| Croquignole perms | are perms in which the hair strands are wrapped at an angle perpendicular to the perm rod in overlapping concentric layers. |
| Curvature perm wrap | is a perm wrap in which partings and bases radiate throughout the panels to follow the curvature of the head. |
