Colour validation

SubstrateDeltaE76

Substrate ΔE₇₆

ΔE₇₆ colour difference between the measured and the reference substrate white. In case of a side-by-side evaluation, the colour control strip is printed absolute colorimetrically. The white substrate which is printed on the media is measured and then compared to the white reference substrate.

SubstrateDeltaE00

Substrate ΔE₀₀

ΔE₀₀ colour difference between the measured and the reference substrate white. In case of a side-by-side evaluation, the colour control strip is printed absolute colorimetrically. The white substrate which is printed on the media is measured and then compared to the white reference substrate.

MaxDeltaE76

Maximum ΔE₇₆

Maximum ΔE₇₆ colour difference between the measured Lab values of the colour patches of the printed colour control strip and the Lab values of the reference chart.

MaxDeltaE00

Maximum ΔE₀₀

Maximum ΔE₀₀ colour difference between the measured Lab values of the colour patches of the printed colour control strip and the Lab values of the reference chart.

AverageDeltaE76

Average ΔE₇₆

Average ΔE₇₆ colour difference between the measured Lab values of the colour patches of the printed colour control strip and the Lab values of the reference chart.

AverageDeltaE00

Average ΔE₀₀

Average ΔE₀₀ colour difference between the measured Lab values of the colour patches of the printed colour control strip and the Lab values of the reference chart.

Percentile95DeltaE76

95^th percentile ΔE₇₆

95% of the measured Lab values of the colour patches on the printed colour control strip have a ΔE₇₆ colour difference smaller than or equal to the reference chart.

Origineel:

Percentile95DeltaE00

95^th percentile ΔE₀₀

95% of the measured Lab values of the colour patches on the printed colour control strip have a ΔE₀₀ colour difference smaller than or equal to the reference chart.

MaxCmykSolidsDeltaE76

Maximum ΔE₇₆ CMYK solids

Maximum ΔE₇₆ colour difference between the measured Lab values of the CMYK solid patches on the printed colour control strip and the Lab values of the CMYK solid patches of the reference chart.

MaxCmykSolidsDeltaE00

Maximum ΔE₀₀ CMYK solids

Maximum ΔE₀₀ colour difference between the measured Lab values of the CMYK solid patches on the printed colour control strip and the Lab values of the CMYK solid patches of the reference chart.

MaxCmykSolidsDeltaDTW

Maximum |ΔDTW| CMYK solids

Maximum |ΔDTW| between the measured Lab values of the CMYK solid patches on the colour control strip and the Lab values of the CMYK solids of the reference chart. The direct distance to white (DTM) is the euclidian distance between the printed substrate white and the patches colour in the Lab colour space.

MaxCmykSolidsDeltaH

Maximum ΔH CMYK solids

Maximum ΔH between the measured Lab values of the CMYK solid patches on the printed colour control strip and the Lab values of the CMYK solids of the reference chart. ΔH is the hue error.

MaxCmykRgbSolidsDeltaDTW

Maximum |ΔDTW| CMYK solids and RGB overprints

Maximum |ΔDTW| between the measured Lab values of the CMYK solid patches and RGB overprint patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. The direct distance to white (DTM) is the euclidian distance between the printed substrate white and the patches colour in the Lab colour space

MaxCmykRgbSolidsDeltaH

Maximum ΔH CMYK solids and RGB overprints

Maximum ΔH between the measured Lab values of the CMYK solid patches and RGB overprint patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error.

MaxCmyRgbSolidsDeltaH

Maximum ΔH CMY solids and RGB overprints

Maximum ΔH between the measured Lab values of the CMY solid patches and RGB overprint patches on the colour control strip and the Lab values of the mathing patches of the reference printing condition. ΔH is the so-called hue error.

MaxCmySolidsDeltaE76

Maximum ΔE₇₆ CMY solids

Maximum ΔE₇₆ colour difference between the measured Lab values of the CMY solid patches on the printed colour control strip and the Lab values of the matching patches of the reference chart.

MaxCmySolidsDeltaE00

Maximum ΔE₀₀ CMY solids

Maximum ΔE₀₀ colour difference between the measured Lab values of the CMY solid patches on the printed colour control strip and the Lab values of the matching patches of the reference chart.

MaxCmySolidsDeltaH

Maximum ΔH CMY solids

Maximum ΔH colour difference between the measured Lab values of the CMY solid patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error.

MaxRgbOverprintsDeltaE76

Maximum ΔE₇₆ RGB overprints

Maximum ΔE₇₆ colour difference between the measured Lab values of the RGB overprint patches on the printed colour control strip and the Lab values of the matching patches of the reference chart.

MaxRgbOverprintsDeltaE00

Maximum ΔE₀₀ RGB overprints

Maximum ΔE₀₀ colour difference between the measured Lab values of the RGB overprint patches on the printed colour control strip and the Lab values of the matching patches of the reference chart.

MaxRgbOverprintsDeltaDTW

Maximum |ΔDTW| RGB overprints

Maximum |ΔDTW| between the measured Lab values of the RGB overprint on the printed colour control strip and the Lab values of the matching patches of the reference chart. The direct distance to white (DTM) is the euclidian distance between the printed substrate white and the patches colour in the Lab colour space

AverageCompGrayDeltaH

Average ΔH composite grays

Average ΔH colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

MaxCompGrayDeltaH

Maximum ΔH composite grays

Maximum ΔH colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

AverageCompGrayDeltaCh

Average ΔCh composite grays

Average ΔCh colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

MaxCompGrayDeltaCh

Maximum ΔCh composite grays

Maximum ΔCh colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

AverageWeightedCompGrayDeltaCh

Average weighted ΔCh composite grays

Average weighted ΔCh colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

The weighted ΔCh formula reduces the significance of the ΔCh measurements for C>50 on a linear scale, beginning at 100% significance when C=0 to C=50 and terminating at 25% significance when C=100. The goal of the weighting function is to minimize the significance of the gray balance errors in very dark composite grays that are usually covered by black ink. This weighting definition is in accordance with the IDEAlliance G7 specification.

MaxWeightedCompGrayDeltaCh

Maximum weighted ΔCh composite grays

Maximum weighted ΔCh colour difference between the measured Lab values of the composite gray patches on the printed colour control strip and the Lab values of the matching patches of the reference chart. ΔH is the hue error. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

The weighted ΔCh formula reduces the significance of the ΔCh measurements for C>50 on a linear scale, beginning at 100% significance when C=0 to C=50 and terminating at 25% significance when C=100. The goal of the weighting function is to minimize the significance of the gray balance errors in very dark composite grays that are usually covered by black ink. This weighting definition is in accordance with the IDEAlliance G7 specification.

AverageCompGrayDeltaL

Average |ΔL| composite grays

Average |ΔL| lightness difference between the measured composite gray patches on the printed colour control strip and the matching patches of the reference chart. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

MaxCompGrayDeltaL

Maximum |ΔL| composite grays

Maximum |ΔL| lightness difference between the measured composite gray patches on the printed colour control strip and the matching patches of the reference chart. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

AverageWeightedCompGrayDeltaL

Average weighted |ΔL| composite grays

Average weighted |ΔL| lightness difference between the measured composite gray patches on the printed colour control strip and the matching patches of the reference chart. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

The weighted |ΔL| formula reduces the significance of the |ΔL| measurements for C>50 on a linear scale, beginning at 100% significance when C=0 to C=50 and terminating at 25% significance when C=100. The goal of the weighting function is to minimize the significance of lightness errors in very dark grays which are less visible compared to lightness errors in lighter tones. This weighting definition is in accordance with the IDEAlliance G7 specification.

MaxWeightedCompGrayDeltaL

Maximum weighted |ΔL| composite grays

Maximum weighted |ΔL| lightness difference between the measured composite gray patches on the printed colour control strip and the matching patches of the reference chart. The composite gray patches have the following properties: K=0, C>0, M=Y, M ≠0, C>M and C<M+17.

The weighted |ΔL| formula reduces the significance of the |ΔL| measurements for C>50 on a linear scale, beginning at 100% significance when C=0 to C=50 and terminating at 25% significance when C=100. The goal of the weighting function is to minimize the significance of lightness errors in very dark grays which are less visible compared to lightness errors in lighter tones. This weighting definition is in accordance with the IDEAlliance G7 specification.

AverageKonlyDeltaL

Average |ΔL| K-only patches

Average |ΔL| lightness difference between the measured K-only patches on the printed colour control strip and the matching patches of the reference chart. A K-only patch is defined as: C=M=Y=0 and K>0.

MaxKonlyDeltaL

Maximum |ΔL| K-only patches

Maximum |ΔL| lightness difference between the measured K-only patches on the printed colour control strip and the matching patches of the reference chart. A K-only patch is defined as: C=M=Y=0 and K>0.

AverageWeightedKonlyDeltaL

Average weighted |ΔL| K-only patches

Average weighted |ΔL| lightness difference between the measured K-only patches on the printed colour control strip and the matching patches of the reference chart. A K-only patch is defined as: C=M=Y=0, K>0 and K<100.

The weighted |ΔL| formula reduces the significance of the |ΔL| measurements for K>50 on a linear scale, beginning at 100% significance when K=0 to K=50 and terminating at 25% significance when K=100. The goal of the weighting function is to minimize the significance of lightness errors in very dark grays which are less visible compared to lightness errors in lighter tones. This weighting definition is in accordance with the IDEAlliance G7 specification.

MaxWeightedKonlyDeltaL

Maximum weighted |ΔL| K-only patches

Maximum weighted |ΔL| lightness difference between the measured K-only patches on the printed colour control strip and the matching patches of the reference chart. A K-only patch is defined as: C=M=Y=0, K>0 and K<100.

The weighted |ΔL| formula reduces the significance of the |ΔL| measurements for K>50 on a linear scale, beginning at 100% significance when K=0 to K=50 and terminating at 25% significance when K=100. The goal of the weighting function is to minimize the significance of lightness errors in very dark grays which are less visible compared to lightness errors in lighter tones. This weighting definition is in accordance with the IDEAlliance G7 specification.

BlackPointDeltaL

Estimated blackpoint |ΔL|

|ΔL| between darkest measured patch on the printed colour control strip and the darkest patch of the reference chart. The darkest patch is the patch with the smallest L value.