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ASTM C1650-14

(Practice)

Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated

Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated

SIGNIFICANCE AND USE
4.1 Color measurement quantifies the coating color for glass and is often related to coating thickness and composition as well as tinting used in the substrate glass. The user of this document defines an acceptable range of color appropriate for the end use. Typical quality concerns for the reflected color measurement of coated glass products are an indication of consistency in the coating process and verification of lot-to-lot color consistency for end-user acceptance.  
4.2 If the reflected color of a glass product is consistent from lot-to-lot and within agreed supplier-buyer acceptance criteria, that product color is expected to be consistent and acceptable for end-use.
SCOPE
1.1 This practice provides guidelines for the instrumental reflectance measurement of the color of flat, coated and uncoated glass. See Terminology E284.  
1.2 The practice specifically excludes fluorescent and iridescent samples.  
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
30-Apr-2014
ICS
17.180.20 - Colours and measurement of light
Technical Committee
C14 - Glass and Glass Products
Drafting Committee
C14.11 - Optical Properties
Current Stage
Ref Project

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ASTM C1650-14 - Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and UncoatedASTM C1650-14 - Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C1650 −14
Standard Practice for
Instrumental Reflectance Measurement of Color for Flat
1
Glass, Coated, and Uncoated
This standard is issued under the fixed designation C1650; 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.
3
1. Scope 2.2 CIE Standard:
CIE 15:2004 Colorimetry, Third Edition
1.1 This practice provides guidelines for the instrumental
reflectance measurement of the color of flat, coated and
3. Summary of Practice
uncoated glass. See Terminology E284.
3.1 The reflected color of glass products, (see Guide E179)
1.2 The practice specifically excludes fluorescent and iri-
is measured in reflectance specular included mode on a
descent samples.
CIE-conforming diffuse geometry instrument. (See Test
Method E1331 and CIE 15:2004.) The glass color is expressed
1.3 The values stated in SI units are to be regarded as
in CIE tristimulus values based on spectral transmittance
standard. No other units of measurement are included in this
measurementsoverthefullCIEspectralrangeof350–780nm
standard.
with a maximum 10-nm band pass. (See CIE 15:2004 and
1.4 This standard does not purport to address all of the
Practice E308.) For color measurement, use of a truncated
safety concerns, if any, associated with its use. It is the
spectral range of 400 – 700 nm is acceptable. (See CIE
responsibility of the user of this standard to establish appro-
15:2004.) Further information on the UV absorbing character-
priate safety and health practices and determine the applica-
istics of the glass or glass coating, or both, may be determined
bility of regulatory limitations prior to use.
by examining the spectral data in the 350 – 400 nm range. If
the instrument allows spectral measurement above 700 nm,
2. Referenced Documents
useful information on the IR reflectance characteristics of the
2 glass coating may also be determined. If coatings are present,
2.1 ASTM Standards:
they can be opaque or partially reflective.
D2244 Practice for Calculation of Color Tolerances and
Color Differences from Instrumentally Measured Color
4. Significance and Use
Coordinates
4.1 Colormeasurementquantifiesthecoatingcolorforglass
E284 Terminology of Appearance
and is often related to coating thickness and composition as
E179 Guide for Selection of Geometric Conditions for
well as tinting used in the substrate glass. The user of this
Measurement of Reflection and Transmission Properties
document defines an acceptable range of color appropriate for
of Materials
the end use. Typical quality concerns for the reflected color
E308 PracticeforComputingtheColorsofObjectsbyUsing
measurement of coated glass products are an indication of
the CIE System
consistency in the coating process and verification of lot-to-lot
E1164 PracticeforObtainingSpectrometricDataforObject-
color consistency for end-user acceptance.
Color Evaluation
E1331 Test Method for Reflectance Factor and Color by 4.2 If the reflected color of a glass product is consistent
Spectrophotometry Using Hemispherical Geometry
from lot-to-lot and within agreed supplier-buyer acceptance
criteria, that product color is expected to be consistent and
acceptable for end-use.
1
This practice is under the jurisdiction of ASTM Committee C14 on Glass and
5. Apparatus
Glass Products and is the direct responsibility of Subcommittee C14.11 on Optical
Properties.
5.1 For color measurements, a CIE-conforming diffuse
Current edition approved May 1, 2014. Published May 2014. Originally
geometry instrument capable of making reflectance measure-
approved in 2007. Last previous edition approved in 2007 as C1650 – 07. DOI:
ments in the specular included mode is required.
10.1520/C1650-14.
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 from CIE – Commission Internationale de L’Eclairage, Wien,
the ASTM website. Austria, www.cie.co.at.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1650−14
5.2 A fixture device is required to consistently place the 8.4 As the stability characteristics of coated and non-coated
sample at the reflection port. glass are generally good, the user may, at their option, read and
record color values for a glass sample to document consistency
5.3 To prevent transmitted signal from being part of the
in the measurement method over time. Care should be taken to
measurement, a light t
...

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: C1650 − 07 C1650 − 14
Standard Practice for
Instrumental Reflectance Measurement of Color for Flat
1
Glass, Coated, and Uncoated
This standard is issued under the fixed designation C1650; 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 This practice provides guidelines for the instrumental reflectance measurement of the color of flat, coated and uncoated
glass. See Terminology E284.
1.2 The practice specifically excludes fluorescent and iridescent samples.
1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.4 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
E284 Terminology of Appearance
E179 Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials
E308 Practice for Computing the Colors of Objects by Using the CIE System
E1164 Practice for Obtaining Spectrometric Data for Object-Color Evaluation
E1331 Test Method for Reflectance Factor and Color by Spectrophotometry Using Hemispherical Geometry
3
2.2 CIE Standard:
CIE 15:2004 Colorimetry, Third Edition
3. Summary of Practice
3.1 The reflected color of glass products, (see Guide E179) is measured in reflectance specular included mode on a
CIE-conforming diffuse geometry instrument. (See Test Method E1331 and CIE 15:2004.) The glass color is expressed in CIE
tristimulus values based on spectral transmittance measurements over the full CIE spectral range of 350 – 780 nm with a maximum
10-nm band pass. (See CIE 15:2004 and Practice E308.) For color measurement, use of a truncated spectral range of 400 – 700
nm is acceptable. (See CIE 15:2004.) Further information on the UV absorbing characteristics of the glass and/or glass coating or
glass coating, or both, may be determined by examining the spectral data in the 350 -– 400 nm range. If the instrument allows
spectral measurement above 700 nm, useful information on the IR reflectance characteristics of the glass coating may also be
determined. If coatings are present, they can be opaque or partially reflective.
4. Significance and Use
4.1 Color measurement quantifies the coating color for glass and is often related to coating thickness and composition as well
as tinting used in the substrate glass. The user of this document defines an acceptable range of color appropriate for the end use.
1
This practice is under the jurisdiction of ASTM Committee C14 on Glass and Glass Products and is the direct responsibility of Subcommittee C14.11 on Optical
Properties.
Current edition approved Aug. 1, 2007May 1, 2014. Published August 2007May 2014. Originally approved in 2007. Last previous edition approved in 2007 as C1650
– 07. DOI: 10.1520/C1650-07.10.1520/C1650-14.
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 U.S. National Committee of the CIE (International Commission on Illumination), C/o Thomas M. Lemons, TLA-Lighting Consultants, Inc., 7 Pond St.,
Salem, MA 01970, http://www.cie-usnc.org.CIE – Commission Internationale de L’Eclairage, Wien, Austria, www.cie.co.at.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1650 − 14
Typical quality concerns for the reflected color measurement of coated glass products are an indication of consistency in the coating
process and verification of lot-to-lot color consistency for end-user acceptance.
4.2 If the reflected color of a glass product is consistent from lot-to-lot and within agreed supplier-buyer acceptance criteria, that
product color is expected to be consistent and acceptable for end-use.
5. Apparatus
5.1 For color
...

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Standard Practice for Specifying Color by the Munsell System

SIGNIFICANCE AND USE
4.1 This practice is used by artists, designers, scientists, engineers, and government regulators, to specify an existing or desired color. It is used in the natural sciences to record the colors of specimens, or identify specimens, such as human complexion, flowers, foliage, soils, and minerals. It is used to specify colors for commerce and for control of color-production processes, when instrumental color measurement is not economical. The Munsell system is widely used for color tolerancing, even when instrumentation is employed (see Practice D3134). It is common practice to have color chips made to illustrate an aim color and the just tolerable deviations from that color in hue, value, and chroma, such a set of chips being called a Color Tolerance Set. A color tolerance set exhibits the aim color and color tolerances so that everyone involved in the selection, production, and acceptance of the color can directly perceive the intent of the specification, before bidding to supply the color or starting production. A color tolerance set may be measured to establish instrumental tolerances. Without extensive experience, it may be impossible to visualize the meaning of numbers resulting from color measurement, but by this practice, the numbers can be translated to the Munsell color-order system, which is exemplified by colored chips for visual examination. This color-order system is the basis of the ISCC-NBS Method of Designating Colors and a Dictionary of Color Names, as well as the Universal Color Language, which associates color names, in the English language, with Munsell notations (3).
SCOPE
1.1 This practice provides a means of specifying the colors of objects in terms of the Munsell color order system, a system based on the color-perception attributes hue, lightness, and chroma. The practice is limited to opaque objects, such as painted surfaces viewed in daylight by an observer having normal color vision. This practice provides a simple visual method as an alternative to the more precise and more complex method based on spectrophotometry and the CIE system (see Practices E308 and E1164). Provision is made for conversion of CIE data to Munsell notation.  
1.2 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.  
1.3 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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