Hair Types, Structures, and Textural Differences
Chemical Composition of Hair
Hair Types and Cross Sections
Hair Analysis and Qualities
Phases of Growth
100

This part of the hair extends above the skin’s surface.


The hair shaft

100

Hair is made of this strong protein.

Keratin

100

The curl configurations or coil pattern of the hair. 



Hair Texture

100

This measures the hair’s ability to absorb liquid.




porosity

100

This is the growth phase of the hair cycle.


anagen

200

The deep, angular, pocket-like depression in the scalp. 


The follicle

200

This element makes up the largest percentage of hair’s composition.

carbon 51%

200

This is usually for straight hair. 



round

200

Hair that is considered overly pour us, releasing needed moisture when dry, and absorbs excessive amounts of water, moisture and chemicals when wet. 




high porosity

200

This is the transition phase when the follicle detaches from the papilla.




catagen

300

The hair shaft consists of these three parts.


The cuticle, cortex, and medulla

300

The links that bond the amino acids together.



peptides

300

This is for coily hair.

 


flat and spiral in shape

300

Hairs ability to stretch and return to its original size and shape.



elasticity

300

This resting phase is when the papilla is inactive.

telogen

400

A sac-like structure that provides the follicle with natural oils.

Sebaceous Gland

400

Hydrogen and salt bonds are considered this type of bond because they are easily broken.



side bonds

400

Is made up of cells from the dermis directly underneath the hair follicle. 



dermal papilla

400

Hair that requires more alkaline solutions to lift the cuticle. It’s hard to absorb moisture. 


 low porosity

400

The amount of strands that naturally shed per days. 



100 strands

500

This is the portion of the hair located beneath the skin’s surface.

The hair root

500

This bond type provides hair with its strength and shape, and can only be broken by chemical changes.

disulfide bond

500

The different characteristics of the curl configuration.


straight,wavy, curly, coily, kinky or wiry

500

When you are conducting a hair analysis for naturally textured hair these are the most important factors to consider. 

curl configurations, pattern, shaft diameter, porosity and elasticity

500

On average, hair grows about this much per month.


half an inch (about 1.25 cm)