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  • ASTM
    C1901-21e2 Standard Test Method for Measuring Optical Retardation in Flat Architectural Glass
    Edition: 2021
    $86.11
    Unlimited Users per year

Description of ASTM-C1901 2021

ASTM C1901-21e2

Active Standard: Standard Test Method for Measuring Optical Retardation in Flat Architectural Glass




ASTM C1901

Scope

1.1 This test method addresses the measurement of optical anisotropy in architectural glass.

1.2 This test method is a test method for measuring optical retardation. It is not an architectural glazing specification.

1.3 The optical retardation values may be used to calculate/predict the amount of visible pattern, commonly known as anisotropy or iridescence, present in heat-treated glass.

1.4 This test method applies to monolithic heat-treated (heat-strengthened and fully tempered) clear, tinted and coated glass.

1.5 This test method does not apply to:

1.5.1 Glass that diffuse light (that is, patterned glass, sand blasted glass, acid etched, etc.), or

1.5.2 Glass that is not optically transparent (that is, mirrors, enameled or fritted glass).

1.6 The optical measurement is integrated through the glass thickness, and therefore cannot be used to assess the level of tempering. It does not give information on the surface stress or center tension.

1.7 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard.

1.8 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.

1.9 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.


Keywords

architectural glass; iridescence; optical anisotropy; optical retardation;


ICS Code

ICS Number Code 17.180.99 (Other standards related to optics and optical measurements)


DOI: 10.1520/C1901-21E02

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