Clinical study of the shine routine

Hair radiance is measured at different stages:

• Before damage: initial measurement
• After deliberate hair damage
• After the first application of the routine

Then after 24 h, 72 h and 96 h

An additional measurement is taken after 8 applications, i.e. approximately 1 month of use.

Shine is measured using a professional spectrophotometer, with an 8° gloss indicator, enabling precise assessment of the hair's radiance and mirror shine.

The hair strands are placed in a controlled climate chamber to ensure the reliability and reproducibility of the results.

The hair strands are subjected to controlled humidity conditions to assess the hair's resistance to frizz.

Measurements are taken:

• before treatment
• after applying the routine
• then after 24 h, 48 h, 72 h and 96 h
  

The hair is placed in a climate chamber:

Temperature: 30 °C
Relative humidity: 70–80 %

The anti-frizz effect is visually assessed by an expert using a defined scale. 

Hydration is measured:

• before hair damage
• after damage
• after treatment with the routine
• then after 24 h, 72 h and 96 h
  
  

The structure of the hair fibre is also analysed using a scanning electron microscope (SEM) to observe:

• the closing of the cuticles
• the reduction of damage
• the improvement of the hair surface.

The water content of the hair is measured using an evaporimeter