ASTM C1650-14 PDF

Scope: 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.

1.1 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.

ASTM C1650-14 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 E1331 Standard Test Method for Reflectance Factor 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 C1650-14(2021) Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated
2014 ASTM C1650-14 Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated
2007 ASTM C1650-07 Standard Practice for Instrumental Reflectance Measurement of Color for Flat Glass, Coated, and Uncoated