Comments sought on proposed revision of JIS K 7142 refractive-index methods
The plastics draft addresses specimen size, temperature control for Method A and repeatability information; comments are due 14 December 2026.
A proposed revision of JIS K 7142, covering refractive-index measurement of plastics, is open for comment. The published proposal discusses specimen dimensions, temperature management for Method A and precision-related descriptions.
The text remains a draft, and the current standard has not yet been replaced. Laboratories using this method should review the official proposal and submit comments by 14 December 2026 if the changes affect their testing.