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ASTM C1649-14(2021)

Current Reaffirmation

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

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1.1 This practice provides guidelines for the instrumental transmittance measurement of the color of coated and uncoated transparent 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 the standard. The values given in parentheses are for information only.

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.


4.1 Color measurement quantifies the transmitted color for glass. The user defines an acceptable range of color appropriate for the end use. A typical quality concern for transmittance color measurement of glass products is verification of lot-to-lot color consistency for end-user acceptance.

4.2 If the transmitted color of a glass product is consistent from lot-to-lot and within agreed supplier-buyer acceptance criteria, the product’s color is expected to be consistent and acceptable for end-use.

SDO ASTM: ASTM International
Document Number C1649
Publication Date July 1, 2021
Language en - English
Page Count 3
Revision Level 14(2021)
Supercedes
Committee C14.11
Publish Date Document Id Type View
May 1, 2014 C1649-14 Revision
Jan. 1, 2008 C1649-08 Revision
July 1, 2021 C1649-14R21 Reaffirmation