Understanding the impact of heat on hairstyles
Hot styling tools have become essential for achieving sleek, voluminous, or perfectly curled hair. However, the high temperatures they generate can wreak havoc on the hair’s structure, leading to a range of issues such as dryness, breakage, and split ends. Moreover, repeated heat exposure can weaken the hair shaft, making it more prone to damage and contributing to overall hair fragility.
The Role of Heat Protection Hair Products
Heat protection hair products are specifically formulated to shield strands from the harmful effects of heat styling. These innovative formulas create a protective barrier around the hair shaft, reducing heat penetration and minimizing the risk of thermal damage. By incorporating heat protectants into your hair care routine, you can enjoy the benefits of heat styling without compromising the health and integrity of your hair.
Key Ingredients for Effective Heat Protection
The effectiveness of heat protection hair products lies in their carefully selected ingredients, each chosen for its ability to protect and nourish your hair under thermal stress:
- Silicones: These versatile compounds form a light barrier on the surface of the hair, sealing in moisture and protecting against heat damage, without weighing the hair down.
- Ceramides: Lipids found naturally in the hair cuticle, ceramides help to reinforce the hair's structure, increasing resistance and protecting against heat-induced breakage.
- Argan oil: Rich in essential fatty acids, argan oil provides hydration and helps repair heat damage, leaving hair soft, shiny and manageable.
- Panthenol (Provitamin B5): Known for its moisturizing properties, panthenol acts on the hair shaft, improving elasticity and protecting against heat damage, while adding body and shine.
How to test the effectiveness of a cosmetic product for thermal protection?
In the case of hair products, it is essential to measure certain physical and chemical properties of the hair strands, which makes it possible to analyze their mechanical behavior. This measurement can be carried out by applying a tensile force to the hair fiber and then evaluating the deformation felt. The analysis of stress and strain curves makes it possible to evaluate the behavior of hair strands under different procedures, such as thermal procedures.
Under the action of a tensile force, a solid material can undergo elastic deformation or plastic deformation. Elastic deformation is reversible and temporary, as the material returns to its original shape after the applied force is removed. The elastic limit is the maximum pressure a material can withstand without suffering permanent deformation. Beyond this limit, plastic deformation occurs, in which the material undergoes permanent deformation and does not recover its original shape. The pressure applied is expressed in terms of force per unit area (F/A).
It is known that the maximum stretching force of the hair shaft, which is represented in terms of tensile strength at break (gmf.mm-2), is closely linked to maintaining the structural (physicochemical) properties of the inner part of the shaft (cortex region). Cosmetic preparations containing specific ingredients create chemically strong bonds, considerably increasing the mechanical strength of the hair shaft. Therefore, by calculating the percentage differences between the maximum strengths, we can assign a percentage improvement or worsening of the resistance/strength of the hair structure.
If an increase is observed in the tensile strength values (gmf.mm-2) of the hair strand after induced thermal damage, comparing the strands treated with the tested product with the strands with the control treatment, it can be said that the product supports the thermal protection claim.
Conclusion
In the quest for flawless hair, thermal protection is the best ally against the harmful effects of heat styling.
Do you want to test your cosmetic products and see if they have thermal protection? Talk to us, we can help!
