ASTM D79-86(2014)

ASTM D79-86(2014) - 1.12.2014

Significance and Use

3.1 Zinc oxide functions as both a chemical and a pigment. It is used in a variety of applications including rubber, paint, reprography, glass, chemicals, etc. In paint, it contributes to mildew protection, ultraviolet absorption, hiding power, and neutralization of acids formed upon oxidation of the paint film.

1. Scope

1.1 This specification covers the pigments commercially known as “zinc white” or zinc oxide. The pigments may be purchased in the dry form or as a paste in oil.

Note 1: Zinc oxides are used in many industries. For additional information, see Classification D4295 and Test Methods D4315 for descriptions of zinc oxide use in rubber compounding.

1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

2. Referenced Documents

D281-12(2021)	Standard Test Method for Oil Absorption of Pigments by Spatula Rub-out
D332-87(2020)	Standard Test Method for Relative Tinting Strength of White Pigments by Visual Observation
D1483-12(2023)	Standard Test Method for Oil Absorption of Pigments by Gardner-Coleman Method
D2745-00(2023)	Standard Test Method for Relative Tinting Strength of White Pigments by Reflectance Measurements
D185-07(2023)	Standard Test Methods for Coarse Particles in Pigments
D3280-85(2020)	Standard Test Methods for Analysis of White Zinc Pigments
D4295-89(2025)	Standard Classification for Rubber Compounding Materials—Zinc Oxide
D280-01(2023)	Standard Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D4315-21(2025)	Standard Test Methods for Rubber Compounding Material—Zinc Oxide
E20-85	Practice for Particle Size Analysis of Particulate Substances in the Range of 0.2 to 75 UM by Optical Microscopy (Withdrawn 1994)