Understanding Hair Lightening and Decolorizing

The video tutorial explains the chemistry of hair lighteners, also known as decolorizers, which work by dispersing and decolorizing natural pigment through oxidation. It details the decolorizing process, which can take up to 90 minutes, and the factors affecting it, such as pigment amount, product strength, and processing time. The tutorial emphasizes the importance of controlling the decolorizing process to achieve the correct contributing pigment for the final hair color. It also highlights the need to maintain hair integrity to prevent damage during lightening.

What is the role of hydrogen peroxide in the hair lightening process?

• It strengthens the hair.

• It acts as a conditioner.

• It releases oxygen to start oxidation.

• It adds color to the hair.

In a double process hair lightening service, what is the first step?

• Adding color to the hair.

• Applying a conditioner.

• Decolorizing the hair to the desired level.

• Cutting the hair.

Why are hair lighteners used to create light blonde shades?

• Because they are cheaper than other products.

• Because they can achieve shades not possible with permanent hair color.

• Because they are faster to apply.

• Because they are less damaging to the hair.

How many stages can natural hair go through during the decolorizing process?

• Up to 20 stages.

• Up to 15 stages.

• Up to 10 stages.

• Up to 5 stages.

What factor does NOT affect the decolorizing process?

• The weather outside.

• Length of time the product processes.

• Strength of the lightening product.

• Amount of pigment in the hair.

What is the goal of controlling the decolorizing process?

• To make the hair thicker.

• To reduce the time needed for coloring.

• To make the hair shinier.

• To create the correct contributing pigment.

What does contributing pigment refer to?

• The amount of damage to the hair.

• The final color of the hair.

• The varying degree of warmth exposed during lightening.

• The natural color of the hair.

What happens if hair is lifted past the pale yellow stage?

• It becomes stronger.

• It becomes shinier.

• It suffers excessive damage.

• It turns green.

Why is maintaining hair integrity important during lightening?

• To change the hair texture.

• To make the hair grow faster.

• To make the hair smell good.

• To ensure the hair remains healthy.

What should be considered when depositing new color on decolorized hair?

• The length of the hair.

• The natural pigment that remains in the hair.

• The time of day.

• The type of shampoo used.