Cosmetics Technology Lecture 7 - Haircare Tech

The visible part of the hair. It has an average thickness of 50-100 microns in an adult.

The part of the hair that extends into the skin and connects to the hair follicle.

The base of the hair root, enclosed by the hair bulb. It contains blood vessels and lymph vessels that provide nourishment to the hair.

A sheath of skin and connective tissue surrounding the hair root.

A small muscle attached to the hair follicle that allows it to stand straight.

A sensitive nerve connected to the hair follicle that detects movement.

The ability of the hair to withstand pulling forces without breaking.

The property that describes how the hair resists stretching and recovers its original shape.

The innermost layer of the hair shaft, often containing air pockets, responsible for hair's texture.

The middle layer of the hair shaft, containing the protein that gives hair strength and color.

The outermost layer of the hair shaft, comprised of overlapping cells, protecting the inner layers.

A strong protein found in the cortex of hair, giving it structure and strength.

The pigment located in the cortex, determining the hair's color.

A complex structure found in the hair shaft, connecting the cuticle to the cortex, acting as a glue.

Elongated cells within the cortex, aligned along the hair's growth axis, contributing to hair's flexibility.

Microscopic, rope-like structures within cortical cells, composed of smaller protein filaments, responsible for hair's strength.

The ability of hair to withstand pulling forces before breaking. It's influenced by factors like humidity, temperature, and the arrangement of keratin molecules.

Describes how hair resists stretching and returns to its original shape. This is influenced by the arrangement of keratin molecules.

The process of hair absorbing moisture from the surrounding environment, leading to changes in its mass and volume. Hair's ability to absorb water is influenced by its structure and composition.

The way hair bends and twists in response to force. This is important for styling and maintaining hair shapes.

A type of structural protein found in hair. It has a complex structure that determines hair's strength, elasticity, and overall properties.

A protein structure in hair that is more rigid, often formed when hair is exposed to heat or chemical treatments. Changes in hair structure can impact tensile strength.

A protein structure commonly found in hair that is helical and more flexible. It readily transforms into beta-sheet keratin under certain conditions.

The hair's ability to resist stretching and return to its original shape. It relates to how much the hair can be stretched before breaking and how quickly it recovers.

Shampoo categories designed for daily use, removing dirt and excess oil while keeping hair healthy.

Shampoo designed to remove buildup from styling products, hard water, or mineral deposits, restoring hair's shine and manageability.

Shampoo that combines cleansing and conditioning properties in one product, simplifying hair care routine.

Shampoo formulated to add moisture and softness to dry or damaged hair, leaving it smooth and manageable.

Shampoo designed to absorb excess oil and grease from hair, refreshing the scalp and providing volume, especially for oily or fine hair.

A measure of how well a material can resist bending or twisting forces. It's like measuring how much force a hair strand can take before it breaks or bends.

A technique used to evaluate mechanical properties of materials like hair. It involves applying force to the material and measuring its reaction.

The ability of a material to resist being wetted by water. Hair's natural hydrophobic layer makes it difficult to wet.

A test that measures how much light is reflected off a surface. It's used to determine how shiny or dull a material is.

A property of hair that describes how much light it reflects. Determines how shiny or dull it appears.

The angle at which a liquid droplet sits on a surface. A high angle indicates hydrophobicity, while a low angle indicates hydrophilicity.

The natural ability of the hair to resist being wetted by water due to the outer cuticle layer.

The friction between hair and tools or products, which influences how easily hair can be styled.

The tendency of hair to attract and hold static electricity, leading to flyaway and frizz.

The force needed to move a weighted sled across a bundle of hair, indicating the slipperiness or roughness of the hair's surface.

The primary haircare product used to cleanse the scalp and hair fibers by removing sebum, dirt, and product residue.