ASTM E430-23 PDF

Full title and description

Standard Test Methods for Measurement of Gloss of High-Gloss Surfaces by Abridged Goniophotometry — a set of abridged goniophotometric test procedures (designation E430‑23) used to quantify the reflection characteristics that determine the glossy appearance of high‑gloss metallic and nonmetallic surfaces (distinctness of image, reflection haze, specular gloss and related indices).

Abstract

This test-method standard (E430‑23) provides two abridged goniophotometry procedures (commonly referred to as Methods A and B) for measuring key gloss appearance metrics of high‑gloss surfaces. The methods are intended for flat or flattenable specimens and are used to obtain values such as distinctness of image (DOI), reflection haze (H), and related specular measurements at specified specular angles. The procedures do not measure color and are not suitable for diffuse finishes.

General information

• Status: Published, current (active test method).
• Publication date: Current edition approved June 1, 2023; published/available in 2023 (document listings show availability/updates in August 2023).
• Publisher: ASTM International (Committee E12 — Color and Appearance; Subcommittee E12.03 — Geometry).
• ICS / categories: 17.040.20 — Properties of surfaces (appearance/optical surface properties).
• Edition / version: E430‑23 (2023 revision of the E430 series of test methods).
• Number of pages: 10 pages.

Scope

These test methods cover measurement of the reflection characteristics responsible for the glossy appearance of high‑gloss surfaces. Two abridged goniophotometry procedures are provided (Methods A and B) for evaluating surface characteristics at specified specular angles (commonly 20° and 30°). The methods are intended for high‑gloss metallic and nonmetallic finishes, are limited to flat or flattenable specimens for DOI measurement, and are not suitable for diffuse finishes nor for measuring color. The standard also references related ASTM practices and test methods used in appearance measurement.

Key topics and requirements

• Measurement of distinctness of image (DOI) for high‑gloss surfaces using abridged goniophotometry.
• Determination of reflection haze (H) and specification of the haze index derived from near‑specular measurements.
• Two defined measurement geometries/methods (Methods A and B) at specified specular angles (20° and 30° as used in the method).
• Limitations and specimen preparation: applicability to flat or flattenable high‑gloss specimens; not for diffuse finishes; does not measure color.
• References to other ASTM practices/test methods and terminology standards (examples: Terminology E284, Specular Gloss methods, color measurement practices) that support correct use and interpretation.
• Precision, bias and interlaboratory considerations — the standard and related research reports provide guidance on repeatability and reproducibility where available.

Typical use and users

Used by quality and R&D laboratories, coatings and paint manufacturers, automotive and architectural finish specifiers, metal finishers, surface‑metrology labs, and standards bodies to quantify and compare the glossy appearance of high‑gloss products and coatings, to control production quality, and to support product specifications and acceptance criteria. The test method is under the jurisdiction of ASTM Committee E12 (Color and Appearance).

Related standards

Commonly referenced/related ASTM documents include Terminology E284 (appearance terms), D523 (Specular Gloss), D4039 (Reflection Haze), E1347 (Color and Color‑Difference measurement), E308 (computing object colors using CIE system), and E691 (interlaboratory precision). These complementary standards and practices provide definitions, gloss measurement methods and precision guidance referenced by E430‑23.

Keywords

distinctness of image; DOI; reflection haze; haze index; specular gloss; abridged goniophotometry; high‑gloss surfaces; sheen; appearance measurement; ASTM E430‑23.

FAQ

Q: What is this standard?

A: ASTM E430‑23 is a test‑method standard titled "Standard Test Methods for Measurement of Gloss of High‑Gloss Surfaces by Abridged Goniophotometry" that defines abridged goniophotometric measurements for quantifying gloss appearance of high‑gloss surfaces.

Q: What does it cover?

A: It covers procedures (Methods A and B) to measure reflection characteristics that determine glossy appearance — including distinctness of image (DOI) and reflection haze — at specified specular angles; it excludes color measurement and diffuse finishes.

Q: Who typically uses it?

A: Coatings and paint manufacturers, automotive and architectural finish specifiers, metal finishers, QC and R&D labs, surface metrology providers, and standards bodies concerned with appearance control.

Q: Is it current or superseded?

A: E430‑23 is the 2023 revision of the E430 series and is listed as the current published edition (approved June 1, 2023; document listings show availability/updates in August 2023). Users should always confirm they have the latest edition from ASTM International.

Q: Is it part of a series?

A: Yes — E430 belongs to a family of appearance and gloss measurement standards maintained by ASTM Committee E12; it is commonly used in conjunction with other standards such as D523 (specular gloss), D4039 (reflection haze), and terminology/practice documents (E284, E308, E691, etc.).

Q: What are the key keywords?

A: Distinctness of image (DOI), reflection haze, specular gloss, abridged goniophotometry, high‑gloss surfaces, sheen, appearance measurement.