D5180-93 – Standard Test Method Technical Guide

⚙️ Test Scope and Instrumentation

ASTM D5180-93 covers the measurement of turbidity in clear liquids. The method is applicable to resin solutions, solvents, clear coatings, monomers, and any other liquids where clarity is specified. This standard is designed to provide an objective, instrumental method that is repeatable and reproducible, but is intended for comparative clarity assessment of similar materials, not for obtaining absolute turbidity values.

The specified apparatus is a ratio recording turbidimeter, which is calibrated in Nephelometric Turbidity Units (NTU) using standards provided by the manufacturer. A key technical