The Skin-Colorimeter CL 400 is available as a stand-alone device, connectable to the MPA systems, or as a wireless probe (please see details in Basic Probe Systems).
The probe sends out white LED light, arranged circularly to uniformly illuminate the skin. The emitted light is scattered in all directions, some parts travel through the layers and some is scattered out of the skin, the light reflected from the skin is measured in the probe and expressed accordingly.
The raw data (XYZ-values) of the probe are corrected with a special colour matrix to be as close as possible to norm values. The measured colour can be calculated into different colour spaces.
RGB colour space: can be understood by thinking of it as all possible colours that can be made from three coloured lights for red, green, and blue.
The CIELAB color space (also known as L*a*b*) is a color space defined by the International Commission on Illumination (CIE). Each letter represents an axis. Correlation between the color space and the human skin:
The probe has been developed especially for the needs of measuring changes in the skin & hair color.
Cosmetic and pharmaceutical efficacy tests, like sun screen products, self-tanners, make-ups, whitening products, patch-testing, decorative cosmetics, hair and carotene food supplements.Typical claims (examples) substantiated with the Skin-Colorimeter: sun protecting, whitening/brightening, skin tone correcting, soothing, micro circulation increasing, vitalising, anti-allergic, anti-irritation, safe, anti-pollution, for sensitive skin, self-tanning, colouring, colour protection, improves healing, concealing, anti-aging, against dark-spots/age-spots/couperosis/dark-circles, non-photosensitive, and many more.
Dimensions: 13 cm, Core measuring area: Ø 5 mm, Illuminated area: approx. 17 mm Ø,
Cable length: approx. 1.3 m, Weight: 85 g
Measurement principle: reflection, Light: 8 white LEDs arranged circularly, range of emitted wavelengths: 440-670 nm, Units: XYZ, RGB, L*a*b* index values (due to the unique structure of the skin and the special light source the values do not fully correspond to ISO standards and are therefore expressed as index values), calibration to skin colours with a special correction matrix
Measurement uncertainty: ± 5 %
For the technical data of the wireless probe, please see Basic Probe Systems.Technical changes may be made without prior notice.