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    ASTM C1650 - 14(2021)

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

    Active Standard ASTM C1650 | Developed by Subcommittee: C14.11

    Book of Standards Volume: 15.02

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    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.

    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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

    1.5 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates

    E179 Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials

    E284 Terminology of Appearance

    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

    CIE Standard

    CIE 15:2004 Colorimetry, Third Edition

    ICS Code

    ICS Number Code 17.180.20 (Colours and measurement of light)

    UNSPSC Code

    UNSPSC Code

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C1650-14R21

    Citation Format

    ASTM C1650-14(2021), Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated, ASTM International, West Conshohocken, PA, 2021, www.astm.org

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