ASTM D5767-17
(Test Method)Standard Test Method for Instrumental Measurement of Distinctness-of-Image (DOI) Gloss of Coated Surfaces
Standard Test Method for Instrumental Measurement of Distinctness-of-Image (DOI) Gloss of Coated Surfaces
SIGNIFICANCE AND USE
4.1 An important aspect of the appearance of glossy coating surfaces is the distinctness (clarity) of images reflected by them. The values obtained in this measuring procedure correlate well with visual ratings for DOI (image clarity).
4.2 Although Test Methods D523 and D4039 are useful in characterizing some aspects of glossy appearance, they do not provide satisfactory ratings for DOI (image clarity).
4.3 The measurement conditions given conform to the conditions specified in Test Methods E430.
4.4 The measurement conditions given in this test method conform to the conditions specified in ISO 10216.
4.5 The scale values obtained with the measuring procedures of this test method range from 0 to 100 with a value of 100 representing perfect DOI (image clarity).
4.6 The DOI (image clarity) scale value does not, of itself, indicate any specific cause for reduction in reflected image sharpness. Surface irregularities such as haze, orange peel, and wrinkle, when present, may be cited as causes for reduction of image sharpness.
SCOPE
1.1 These test methods describe the measurement of the distinctness-of-image (DOI) gloss of coating surfaces using electro-optical measuring techniques.
1.2 The coatings assessed shall be applied to planar rigid surfaces.
1.3 Test Method—The light through a small slit is projected on the specimen surface and its reflected image intensity is measured through a sliding combed shutter to provide a value of image clarity.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Designation: D5767 − 17
Standard Test Method for
Instrumental Measurement of Distinctness-of-Image (DOI)
1
Gloss of Coated Surfaces
This standard is issued under the fixed designation D5767; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3964Practice for Selection of Coating Specimens for
Appearance Measurements
1.1 These test methods describe the measurement of the
D4039Test Method for Reflection Haze of High-Gloss
distinctness-of-image (DOI) gloss of coating surfaces using
Surfaces
electro-optical measuring techniques.
E284Terminology of Appearance
1.2 The coatings assessed shall be applied to planar rigid
E430TestMethodsforMeasurementofGlossofHigh-Gloss
surfaces.
Surfaces by Abridged Goniophotometry
E691Practice for Conducting an Interlaboratory Study to
1.3 Test Method—The light through a small slit is projected
on the specimen surface and its reflected image intensity is Determine the Precision of a Test Method
3
measured through a sliding combed shutter to provide a value
2.2 ISO Standards:
of image clarity.
ISO 10216 Anodizing of aluminum and its alloys—
Instrumental determination of image clarity of anodic
1.4 The values stated in SI units are to be regarded as
oxidation coatings—Instrumental method
standard. No other units of measurement are included in this
ISO17221Plastics—Determinationofimageclarity(degree
standard.
of sharpness of reflected or transmitted image)
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
3. Terminology
responsibility of the user of this standard to establish appro-
3.1 Definitions—Terms and definitions in Terminology
priate safety, health and environmental practices and deter-
E284 are applicable to these methods.
mine the applicability of regulatory limitations prior to use.
3.1.1 distinctness-of-image (DOI) gloss, n—aspect of gloss
1.6 This international standard was developed in accor-
characterized by the sharpness of images of objects produced
dance with internationally recognized principles on standard-
by reflection at a surface. E284
ization established in the Decision on Principles for the
3.1.1.1 Discussion—This quality is sometimes called image
Development of International Standards, Guides and Recom-
clarity.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. 3.1.2 gloss reflectance factor, R ,n—ratio of the specularly
s
reflectedpartofthe(whole)fluxreflectedfromthespecimento
2. Referenced Documents
the flux reflected from a specified gloss standard under the
2
2.1 ASTM Standards:
same geometric and spectral conditions of measurements.
D523Test Method for Specular Gloss E284
D823Practices for Producing Films of Uniform Thickness
3.1.2.1 Discussion—The gloss standard may be a black
of Paint, Varnish, and Related Products on Test Panels glass or mirror and may be assigned one of a variety of scale
D2457Test Method for Specular Gloss of Plastic Films and
values as specified.
Solid Plastics
3.1.3 specular angle, n—angle of reflection equal and op-
posite to the angle of incidence. E284
1
This test method is under the jurisdiction of ASTM Committee E12 on Color
and Appearance and is the direct responsibility of Subcommittee E12.03 on
4. Significance and Use
Geometry.
Current edition approved June 15, 2017. Published September 2017. Originally 4.1 Animportantaspectoftheappearanceofglossycoating
approved in 1995. Last previous edition approved in 2012 as D5767–95(2012).
surfaces is the distinctness (clarity) of images reflected by
DOI: 10.1520/D5767-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D5767 − 17
DIMENSIONS HA-ICM
A—Slit—0.1 mm
B—Light Angle—22°
C—Slit/Lens Dist.—50 mm
D—Lens—f 50 mm
E—Lens/Test Spec. Dist.—50 mm
F—Test Spec./Lens Dist.—50 mm
G—Lens—f 50 mm
H—Lens/Com. Shut. Dist.—50 mm
I—Light Angle—22°
J—Shut./Slit Length—10 mm
K—Shut./Slit Width—0.5 mm
L—Shut./Slit Space—0.5 mm
FIG. 1 Diagrammatical Representation of Image Clarity Measurement
them. The values obtained in this measuring procedure corre- 5. Apparatus
4
late well with visual rating
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5767 − 95 (Reapproved 2012) D5767 − 17
Standard Test MethodsMethod for
Instrumental Measurement of Distinctness-of-Image (DOI)
1
Gloss of CoatingCoated Surfaces
This standard is issued under the fixed designation D5767; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 ThisThese test method describesmethods describe the measurement of the distinctness-of-image (DOI) gloss of coating
surfaces using electro-optical measuring techniques. The coatings must be applied to planar rigid surfaces. The scale values
obtained from the alternative methods cited do not agree.
1.2 The coatings assessed shall be applied to planar rigid surfaces.
1.3 Test Method—Three test methods are covered as follows:The light through a small slit is projected on the specimen surface
and its reflected image intensity is measured through a sliding combed shutter to provide a value of image clarity.
1.2.1 Test Method A—Gloss reflectance factor measurements are made on the specimen at the specular viewing angle and at an
angle slightly off the specular viewing angle. The values obtained are combined to provide a DOI value. Very narrow source and
receptor aperture angles are used in the measurements.
1.2.2 Test Method B—The light through a small slit is projected on the specimen surface and its reflected image intensity is
measured through a sliding combed shutter to provide a value of image clarity.
1.2.3 Test Method C—The light through a pattern is projected on the specimen surface and its reflected image intensity is
measured directly to provide a value of image clarity.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of whoever uses the user of this standard to consult and establish appropriate safety safety, health and healthenvironmental
practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D523 Test Method for Specular Gloss
D823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels
D2457 Test Method for Specular Gloss of Plastic Films and Solid Plastics
D3964 Practice for Selection of Coating Specimens for Appearance Measurements
D4039 Test Method for Reflection Haze of High-Gloss Surfaces
E284 Terminology of Appearance
E430 Test Methods for Measurement of Gloss of High-Gloss Surfaces by Abridged Goniophotometry
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
3
2.2 OtherISO Standards:
ISO 10216 Anodized Aluminum and Aluminum Alloys—Instrumental Determination of Image Clarity of Anodic Oxidation
Coatings—Instrumental MethodAnodizing of aluminum and its alloys—Instrumental determination of image clarity of anodic
oxidation coatings—Instrumental method
1
This test method is under the jurisdiction of ASTM Committee E12 on Color and Appearance and is the direct responsibility of Subcommittee E12.03 on Geometry.
Current edition approved July 1, 2012June 15, 2017. Published August 2012September 2017. Originally approved in 1995. Last previous edition approved in 20042012
as D5767 – 95 (2004).(2012). DOI: 10.1520/D5767-95R12.10.1520/D5767-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5767 − 17
DIMENSIONS HA-NSIC
A- Light Source − 12V; 20W
B-
...
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