Colorhold

Seals the colorants within the fiber

The addition of COLORHOLD in post dye products, like shampoos, conditioners and masks, reduces the color fading.

Download the Bulletin (EN) Baixe o Boletim (PT)

Benefits

Alignment of hair cuticles, Prevention of color fading, Softness (hair)

INCI Name

Aqua, Hydrolyzed Rice Protein, Sodium Carrageenan, Sodium Benzoate and Potassium Sorbate.

Hair Dyes

Maintenance of the color with COLORHOLD

The main challenge in permanent dyes is the maintenance of color over time. Due to frequent washing, the colorants formed during the dyeing process are continuously removed from inside of the hair fiber.

ASSESSA has developed a unique Double Blocking System that operates at two different levels of the hair fiber to maintain the color into the hair matrix.

The first level is the hair cortex, where special amino acids and peptides in COLORHOLD penetrate the hair fiber during and after dyeing, trapping the colorants inside the cortex.

The second level is the cuticle layer, where the bio-molecules in COLORHOLD form a nano-network around the strands, repositioning the cuticles and sealing the colorants within the fiber.

This Double Blocking System ensures long lasting color in the hair.

Permanent dye

COLORHOLD in shampoos

Hair fiber structure 1

Hair fiber structure 2

Color Fading

Direct measuring in hair strands

Color Measurements Protocol

Permanent hair dyes (test formulas and placebo) were prepared using the same concentrations of precursors and couplers.
Test formulas were evaluated with 2% COLORHOLD.
Color measurements were taken with a Konica Minolta Colorimeter.
Measurements were made in 3 points of each strand: root, middle, and tip.

Fading Prevention Analysis

COLORHOLD prevents the fading of the color. The difference in color increases with the number of washings.

COLORHOLD vs Competitors Testing

ColorHold was tested against 3 ingredients that carry similar claims. The results indicate significant color intensity preservation over competitive solutions.

ΔL refers to the difference in measures of the lightness parameter along the L axis between the initial (zero) point and the color measured after 1, 3, 5 and 7 washing cycles.
Lightness is related to the color intensity. Higher scores are related to less color, or fading.
Smaller ΔL = smaller difference from the initial point = less color fading (darker tresses = less fading).

1. Fading

2. COLORHOLD x Competitors

3. Maintenance of Color

Usage Levels Recommendation