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10 Skin Color
10.1 How to perform a measurement
The measurement head is placed gently on the skin without applying force. If pressure is applied
to the skin, the skin color may change because blood is forced away from the capillaries in the
area. Depending on the amount of pigment, this may cause the skin to appear pale when com-
pared to the surrounding skin (blanching). Measurements are optimally performed on as plane a
surface as possible to avoid any external light from entering the measurement area. Because skin
is translucent, measuring in direct sunlight may affect the measurement as light is passed through
the skin.
When measuring gloss, it is also important to reduce the amount of force applied to the skin as
any skin forced into the head of the probe head will result in non-optimal measuring conditions.
Keeping the probe head away from the skin will also result in non-optimal readouts as outside
sources of light can interfere with the measurement. The probe shall be held steady and perpen-
dicular to the surface without applying pressure to the skin.
10.2 Color-correction matrix
A Color correction matrix is used on the Skin Colori Probe to ensure the most accurate readout
based on what range of colors the Skin Colori Probe is being used on.
10.2.1 Full Color
The full Color matrix is optimized for the entire color spectrum, attempting to provide the best pos-
sible readout no matter what color the measured area has.
10.2.2 Skin Optimized
The Skin optimized correction matrix is optimized for skin colors only, resulting in more accurate
results when measuring on human skin tones (class I to VI). The average color difference when
measuring on skin is generally lower when measuring using this matrix. The average color differ-
ence when measuring on non-conventional skin colors (e.g. blue or green), will be higher. There-
fore, this matrix should not be used when measuring on anything other than skin.
10.3 Measurement mode and time
The Skin Colori Probe has several measurement mode options. Depending on which option is
chosen, each measurement may take a different amount of time to complete. Measuring only
Color or Gloss will result in a faster measurement. Selecting any option enabling both gloss and
color measurement will result in a longer amount of time for each total measurement to complete.
It is therefore advised that if either color or gloss is not used, it should be disabled in the Colorim-
eter Skin Colori Probe settings to increase the speed of future measurements.
Mode
Measurement
Color
Gloss
Color + gloss
CORTEX TECHNOLOGY ApS
time
< 1 s
< 1 s
< 2 s
32/66
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