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Whitening/ Lightening
Whitening/ Lightening
Whitening/ lightening efficacy
Testing the whitening or lightening efficacy of cosmetic products is a specialized process used to evaluate the ability of a product to reduce non-spot area, dark spots, or melasma.
These tests help determine whether the product can deliver the claimed benefits of skin whitening or lightening. Here are the key considerations for conducting whitening/lightening efficacy tests for cosmetic products:
Measurement: face/ dark spot/ scar/ melasma/ melanin/ body/ armpit
Kinetics: T0 and T+X weeks
Conclusion:
- Skin whitening
- Skin lightening
Chromameter/ Spectrophotometer
Measurements are expressed in the form of L*a*b*:
- L* represents the relative brightness from total black (L*=0) to total white (L*=100)
- a* represents the balance between red and green
- b* represents the balance between yellow and blue
Therefore L* and ITA° are considered for the assessment of color changes throughout the study, the lighter the skin, the higher the L* and ITA° values.
>> Only statistic number data <<
Antera 3D®
is a camera developed by Miravex Limited could be used for image acquisition by illuminating skin with multidirectional light emitting diodes of seven different light wavelengths spanning over the entire visible spectrum.
PARAMETERS
Color Image (Whitening/ Lightening)
• Color variation (ΔE)
• Skin brightness (L*)
• Skin redness (a*)
• Skin sallowness (b*)
Hemoglobin (redness)
• Average hemoglobin value
• Variation (consistency)
• Relative variation (%)
Melanin
• Average melanin value
• Variation (consistency)
• Relative variation (%)
>> Statistic number data and photography <<
Digital photographs with analysis of;
Measurements are expressed in the form of L*a*b*:
- L* represents the relative brightness from total black (L*=0) to total white (L*=100)
- a* represents the balance between red and green
- b* represents the balance between yellow and blue
Therefore L* and ITA° are considered for the assessment of color changes throughout the study, the lighter the skin, the higher the L* and ITA° values.
>> Statistic number data and photography <<
Mexameter
Results are displayed on the device as “E” value for “erythema” and “M” for “melanin” value.
- A decrease in the melanin index corresponds to a decrease in the melanin pigmentation
- A decrease in the erythema index corresponds to a decrease in the haemoglobin in the skin
>> Only statistic number data <<
20 March 2024
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