ASTM C1649-14 PDF

Scope: 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.

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

ASTM C1649-14 Referenced Document

ASTM D2244 Standard Test Method for Calculation of Color Differences From Instrumentally Measured Color Coordinates
ASTM E1164 Standard Practice for Obtaining Spectrophotometric Data for Object-Color Evaluation
ASTM E1348 Standard Test Method for Transmittance and Color by Spectrophotometry Using Hemispherical Geometry
ASTM E179 Standard Guide for Selection of Geometric Conditions for Measurement of Reflection and Transmission Properties of Materials
ASTM E284 Standard Terminology of Appearance
ASTM E308 Standard Practice for Computing the Colors of Objects by Using the CIE System

2021 ASTM C1649-14(2021) Standard Practice for Instrumental Transmittance Measurement of Color for Flat Glass, Coated and Uncoated
2014 ASTM C1649-14 Standard Practice for Instrumental Transmittance Measurement of Color for Flat Glass, Coated and Uncoated
2008 ASTM C1649-08 Standard Practice for Instrumental Transmittance Measurement of Color for Flat Glass, Coated and Uncoated