Colour

Colour … … is in the eye of the beholder … isn’t it ?

Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

10.000.000 ,[object Object],[object Object],[object Object]

What is colour ? ,[object Object],[object Object],[object Object],[object Object],[object Object]

CIE-color systems (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CIE-color systems (2) ,[object Object],Measured data of a sample

CIE-color systems (3) ,[object Object],[object Object],Measured data of a sample X Spectrum of D65/10 ° -illuminant

CIE-color systems (4) ,[object Object],CIE 2 ° and 10° standard observers

CIE-color systems (5) ,[object Object]

CIE-color systems (6) ,[object Object],[object Object]

CIE-color systems (9) ,[object Object],[object Object],[object Object],In 1976 this was modified to: and CIELUV coordinates are defined as:

CIE-color systems (11) ,[object Object],[object Object],[object Object]

CIE-color systems (12) ,[object Object],[object Object],[object Object]

CIE-color systems (13) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CIE measurement geometry (1) ,[object Object],[object Object],[object Object],[object Object],[object Object]

CIE measurement geometry (2) ,[object Object]

Color difference/tolerancing (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Color difference/tolerancing (2) ,[object Object],[object Object],[object Object],[object Object]

Color difference/tolerancing (3) ,[object Object],[object Object],The total color difference can be expressed as ΔE*=13.71 On the a* axis, a reading of –6.10 indicates greener or less red. On the b* axis, a reading of –5.25 indicates bluer or less yellow. On the L* plane, the measurement difference of +11.10 shows that Flower C is lighter than Flower A.

Color difference/tolerancing (4) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Color difference/tolerancing (5)

Color difference/tolerancing (6) ,[object Object],[object Object],[object Object]

Color difference/tolerancing (11) ,[object Object],[object Object],[object Object],[object Object]

Color difference/tolerancing (12) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Yellowness Index (1) ,[object Object],[object Object],[object Object],[object Object],[object Object]

Yellowness Index (2) ,[object Object],[object Object],[object Object],1.1498 1.3013 ASTM E 313, D 65 /10° 1.0781 1.2871 ASTM E 313, C/10 ° 1.1335 1.2985 ASTM E 313, D 65 / 2 ° 1.0592 1.2769 ASTM E 313, C/2 ° 1.06 1.28 ASTM D 1925, always 2 ° Cz Cx

Yellowness Index (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Yellowness Index (4) ,[object Object],[object Object]

Yellowness Index (5) ,[object Object],[object Object],[object Object]

Yellowness Index (6) ,[object Object],[object Object],[object Object],[object Object]

Yellowness Index (7) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Yellowness Index (8) ,[object Object],[object Object],[object Object]

Yellowness Index (9) ,[object Object],YI 0,7 b 0,6 YI 1,7 b 1,6 YI 2,5 b 1,7 YI 3,7 b 2,4 YI 4,9 b 3,3 YI 9,0 b 5,9 YI 14,0 b 9,5 YI 16,9 b 11,4 YI 26,7 b 18,9

Yellowness Index (10) ,[object Object],YI 0,7 b 0,6 YI 1,7 b 1,6 YI 2,5 b 1,7 YI 3,7 b 2,4 YI 4,9 b 3,3 YI 9,0 b 5,9 YI 14,0 b 9,5 YI 16,9 b 11,4 YI 26,7 b 18,9

Conclusions ,[object Object],[object Object],[object Object]

Colour

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