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D4845-10 – Standard Test Method Technical Guide
ASTM D4845-10 (Reapproved 2018) serves as the definitive lexicon for the wool and animal fiber industry, consolidating essential terminology from over 20 related standards under the jurisdiction of Subcommittee D13.13 on Wool and Felt. It ensures uniform interpretation of critical testing parameters across laboratories and commercial enterprises.
🔬 Defining Core Physical and Chemical Properties
Establishing an unambiguous vocabulary is paramount in textile testing. D4845 formalizes the definitions for core chemical and physical tests related to the condition and composition of wool and felt.
| 🧪 Term / Property | 📐 Reference Standard | 🎯 Key Definition / Scope |
|---|---|---|
| Acid Content (Felt) | D461 | Number of milliequivalents of acid present per unit weight of felt, measured under prescribed conditions. |
| Alkali-Solubility | D1283 | Percent of clean wool soluble in a specified alkaline solution under controlled conditions of temperature and time. |
| Moisture in Wool | D1576 / D2462 | Percentage of moisture determined by oven-drying or by distillation with toluene. |
| pH of Wool Extract © 2026 TNLab — This article is a technical interpretation for reference only. The original standard as published by ASTM International takes precedence. 📥 Standard Documents Download |