Jetness Measurement - Altana BYK spectro2go Kurzbedienungsanleitung

BYK-Gardner GmbH

9 Jetness Measurement

The spectro2guide Pro can measure the jetness of deepest black with special
indices.
Go to Configuration > Measurement Parameters > Jetness indices. Activ-
ate following indices:
• My: Blackness determines the lightness of black without colored under-
tone.
• Mc: Jetness determines the color depending black value.
• dM: Undertone determines the absolute contribution of hue.
Activation changes to a different measuring range in the instrument - which is
valid only for samples with deepest black.
Place instrument on deep black sample and measure it, see for example
"Difference Measurement
To measure gray samples deactivate the jetness indices My, Mc, dM and activ-
ate the grayness indices Gy, Gc, dG. Grayness measurement takes place in the
normal color measuring range.
Important
To measure all other colors, deactivate the jetness indices. Otherwise an error
message will appear: "Sample to bright! Please switch off M-indices...".
Notice
An LED flashlight is included in delivery to check deep black samples and the
separate jetness standards for cleanliness before use. Best usage of the flash-
light is in an angle 0°..15° for dust and 75°..90° for streaks.
295 025 088 - 2106
– Undertone +dM = Blue shade
– Undertone -dM = Brown shade
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spectro2guide Pro
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