Active Standard ASTM D542 | Developed by Subcommittee: D20.40
Book of Standards Volume: 08.01
Historical (view previous versions of standard)
Significance and Use
4.1 This test method measures a fundamental property of matter which is useful for the control of purity and composition for simple identification purposes, and for optical parts design. This test method is capable of readability to four figures to the right of the decimal point.
1.1 This test method covers a procedure for measuring the index of refraction of transparent organic plastic materials.
1.2 A refractometer method is presented. This procedure will satisfactorily cover the range of refractive indices found for such materials. Refractive index measurements require optically homogeneous specimens of uniform refractive index.
1.3 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C162 Terminology of Glass and Glass Products
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
D1898 Practice for Sampling of Plastics
E284 Terminology of Appearance
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ISO StandardISO489-1983 Determination of the Refractive Index of Transparent Plastics--Part A Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
ICS Number Code 83.080.01 (Plastics in general)
UNSPSC Code 13100000(Rubber and elastomers)