BYK-Gardner Gloss and Color · Page 27, BYK-Gardner GmbH, Color Measurement ISO 3668 ASTM D1729 DIN...

BYK-Gardner

Gloss and Color Wesel, 2016, Henrik Folkerts

Hamburg

Rostock

Berlin

Erfurt

Magdeburg

Dresden Düsseldorf

Frankfurt /M.

München

Wesel

Stuttgart

Hannover

Saarbrücken

Bremen

Kiel

Nürnberg

Geretsried

Your Partner

Güntersthal

Quality Control for Paint and Plastic

BYK-Gardner is setting standards

micro-gloss – the leader in gloss measurement

• Automatic calibration on high –

low gloss tiles

• Master standards traceable to

BAM / NRC

• Long-term drift check

• Controlled operating conditions

Excellent performance

Quality is our Business: micro-gloss Production

Surface quality

Color

Effect

Orange Peel

Gloss

Distinctness of Image

Haze

Specular Reflection

(= Gloss) Diffuse Reflection

Reflection

Incident light

Glossmeter Design

α1 ± 0.1°

α2 ± 0.1°

e.g. Receptor aperture

20°: 1.8° ± 0.05°

20°

Defined Angles of Illumination

20°

~ 10 x 10 mm

60°


60°

~ 9 x15 mm

85°


85°

~ 5 x 38 mm

Semi Gloss Low Gloss High Gloss

0

1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

1 2 3 4 5 6 7 8 9 10 11 12 13

Angles of Illumination

85°

60°

20°

GU

increasing gloss perception

Recommended geometry Gloss level

Semi gloss

High gloss

Low gloss

60° value

10 to 70 units

> 70 units

< 10 units

60° geometry

20° geometry

85° geometry

Recommended Geometries

0

10

20

30

40

50

60

70

80

90

100

Start 100 h 200 h 250 h

GU

Panel A / 20°

Panel B / 20°

Panel A / 60°

Panel B / 60°

UV-B Weathering Test PUR Coil-Coating System

• new auto diagnosis in the holder

checks calibration ...

• tells you when to calibrate

• checks whether the standard is clean

standard and optics are

always protected in the holder

OK

Autodiagnosis

micro-gloss save and reliable measurements

micro-gloss textured surfaces

1

2

3 4

5

e.g. 60°

NEW micro-gloss Intelligent gloss measurement with smart communication

60° Gloss measurement

•According to international standards

•Opening: 9.2 mm x 2 mm

•Spot size : 4.0 mm x 2 mm

New micro-gloss with small aperture: micro-gloss XS

Ideal for small parts and components

Surface quality

Color

Effect

Orange Peel

Gloss

Distinctness of Image

Haze

6/22/2016, , BYK-Gardner GmbH, Grundlagen der Farbmetrik

Do you see dots at the intersections?

, BYK-Gardner USA, Color Measurement

, BYK-Gardner GmbH, Color Measurement

Color Perception

Light Source

Object

Observer


Things look different under different illuminants

Standard illuminants

400 500 600 700

Wavelength [nm]

E l

D65

North Sky Daylight

400 500 600 700

Wavelength [nm]

F2E l

Fluorescent

400 500 600 700

Wavelength [nm]

E lA

Tungsten

illuminant


2°

2° observer (1931)

• Small area of the retina

• Does not agree with color viewing

10°

10° observer (1964)

• Large area of the retina

• Corresponds with color viewing

The Eye and Fields of View observer


ISO 3668 ASTM D1729 DIN 6173 SAEJ 361

Main Illuminant D65 D65/D50/D75 D65 D65/Horizon (~ D50)

Illuminants for Metamerism

A A/F2/F11 Nd F2

Level of Illumination

1000 - 4000 lx 1080 – 2150 lx 1000 – 5000 lx 1080 – 1730 lx

Color of interior Matte neutral grey (a*,b* < 1)

General: L*= 45-55

Light color L* > 65

Dark color L* = 25

Matte neutral grey

N6 – N7,

(~ L* = 61-71)

Matte neutral grey

Matte neutral grey

N6 – N7,

(~ L* = 61-71)

Gloss of interior nd 60° gloss < 15 GU nd nd

Diffuser Panel X X X X

International Standards for Visual Evaluation of Solid Colors


Visual Evaluation of Solid Colors (ISO 3668) Observer

• Defined D65, A, F11

• Diffused illumination

• Viewing distance 500 mm to correspond to 10° Observer

• Illumination perpendicular / viewing 45° or vice versa


Visual Evaluation of Solid Colors byko-spectra – according to ASTM and ISO

New 2016:

byko-spectra lite QC

Specular Reflection

(= Gloss) Diffuse Reflection

Reflection

Incident light


yellow

red

green

blue

Object Color Spectral Reflectance Curves

object


× ×

Illuminant

400 500 600 700

Wavelength [nm]

E lA

A

Object

Color Scales: X Y Z L*a*b*, ....

The Building Blocks of Color

Observer

2°

L*= 100

+a*

-a*

+b*

-b*

Blue

Red

Green

Yellow

L*= 0

E* = √ (L*)2 + (a*)2 + (b*)2

= Sample - Standard

E* L*

b* a*

- +

L*

a*

b*

- +

- +

CIELAB - System: Color Difference DL*, Da*, Db*

Color system

Standard

Sample 1

Sample 2

1

2

E* = √(L*)2 + (a*)2 + (b*)2

E* = √(0.0)2 + (1.0)2 + (0.0)2 = 1

E* = √(0.57)2 + (0.57)2 + (0.57)2 = 1

Component Differences Determine the cause of a mismatch

Color system

, BYK-Gardner GmbH, Colour Measurement

D65 / 10°

spectro-guide 45/0

Colour Scale Standard Sample Differences

L* 36.84 37.77 0.93

a* -24.10 -24.59 -0.49

b* 12.00 11.88 -0.12

dE* = 1.05

geometry Measurement Report

Does the colour match? Do the two sides look different?

Colour and gloss influence the

visual impression

The structured part looks lighter,

despite being made of the same

coloured material!


Typical Applications:

• Comparison to defined standard

• Batch-to-batch control

• Harmonization of various

materials/structures

Differences in gloss/ structure Colour Differences

Circumferential illumination reduces directionality influence

Visual Perception: 45/0 Geometry


Typical Applications:

• Colour matching

• Colour strength development

• Weathering studies

Differences in gloss/structure Colour Differences X

Colour Hue Control: Sphere Spin


Evalutes colour

pigmentation

sphere SPIN *

Colour as we see it

45°

0°

45/0

Comparison: 45/0 - sphere spin

dL* = 4,79

da* = 0,26

db* = -0,04

dL* = 0,06

da* = 0,09

db* = -0,01

dE* = 4,79 dE* = 0,10 60° 30 GE

60° 5 GE


spectro-guide sphere gloss:

control the colour hue + 60°gloss

spectro-guide 45/0 gloss:

colour as you see it + 60° gloss

spectro-guide Family

Related Links

• Seminars: http://www.byk.com/en/press-events/seminars-training.html

• Webinars:

http://www.byk.com/en/press-events/webinars.html

• Videos: http://www.byk.com/en/support/instruments/videos.html

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http://www.byk.com/en/support/instruments/download-catalog.html

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What‘s new at BYK-Gardner New Services

on www.byk.com and

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NEW micro-gloss

Intelligent gloss measurement with smart communication

What‘s new at BYK-Gardner New Products

Light booth for solid color (Byko-spectra lite )

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BYK-Gardner Gloss and Color · Page 27, BYK-Gardner GmbH, Color Measurement ISO 3668 ASTM D1729 DIN...

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Transcript of BYK-Gardner Gloss and Color · Page 27, BYK-Gardner GmbH, Color Measurement ISO 3668 ASTM D1729 DIN...