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D3820-02 – Standard Test Method Technical Guide
📐 Scope and Application
ASTM D3820-02 establishes a comprehensive performance specification for woven fabrics used in men’s and boys’ underwear. The scope explicitly covers fabrics composed of any textile fiber or any mixture of textile fibers. A critical requirement of this specification is that the applicable standards must be satisfied in both the length (warp) and width (filling) directions where the fabric’s orientation is pertinent to the property being evaluated. The standard includes a dedicated safety caveat, clearly stating that it does not address all safety concerns associated with its use and placing the responsibility on the user to establish safe health practices and determine regulatory compliance prior to application.
⚙️ Referenced Test Methods and Procedures
The framework of D3820-02 relies entirely on a robust set of referenced ASTM and AATCC test methods. These methods ensure uniform evaluation of mechanical properties, dimensional stability, and colorfastness across the industry. The following table outlines the primary properties and their corresponding standard evaluation procedures:
| 🟦 Property | 📏 Test Method | 🎯 Evaluation Focus |
|---|---|---|
| Breaking Force & Elongation | D 5034 | Tensile strength via grab test |
| Tear Resistance | D 1424 / D 2261 / D 2262 | Falling-pendulum & tongue rip |
| Resistance to Yarn Slippage | D 434 | Seam slippage in woven fabrics |
| Dimensional Change | AATCC 96 / AATCC 135 | Shrinkage after home laundering |
| Colorfastness to Crocking | AATCC 8 / AATCC 116 | Dry and wet crocking resistance |
| Colorfastness to Perspiration | AATCC 15 | Acid and alkaline perspiration |
| Colorfastness to Washing | AATCC 61 | Color change and staining |
| Colorfastness to Light | AATCC 16 | Light exposure degradation |
| Colorfastness to Bleach | AATCC 172 / AATCC 188 | Non-chlorine & chlorine bleach |
| Flammability | 16 CFR 1610 | Apparel fabric burning rate |
⚠️ Safety and Compliance Note:
In addition to the specific ASTM and AATCC methods, this standard mandates compliance with the federal flammability standard (16 CFR Part 1610) and references MIL-STD-105D for attribute sampling. The user bears full responsibility for understanding and applying all applicable safety and regulatory limitations.
📊 Key Measured Properties and Evaluation
This performance specification ensures that fabrics meet rigorous standards across three core areas: mechanical integrity, dimensional stability, and colorfastness. Mechanical property tests, such as the grab test (D 5034) and Elmendorf tear (D 1424), verify that the fabric can withstand the stresses of wear and laundry. Dimensional stability is evaluated through AATCC 96 and AATCC 135 to ensure the garment retains its shape. Colorfastness is rated using the AATCC Gray Scale for Color Change (Evaluation Procedure 1), the Gray Scale for Staining (Evaluation Procedure 2), and the AATCC Chromatic Transference Scale (Evaluation Procedure 3), covering resistance to washing, light, crocking, perspiration, bleach, and burnt gas fumes.
💡 Edition Consistency is Critical:
Note 1 of the standard specifies that the designations provided are permanent references only. It is mandatory to use the current, approved editions of each cited ASTM or AATCC test method to guarantee that results are fully aligned with the latest technical practices and industry consensus.
❓ Frequently Asked Questions
🔍 What types of fabrics are covered by ASTM D3820-02?
The specification is explicitly written for men’s and boys’ woven underwear fabrics. It covers any fiber type or blend, provided the fabric is of woven construction.
💡 Does the extracted text include the specific pass/fail values?
No. The provided excerpt details the Scope, Referenced Documents, and Terminology. The actual numerical performance limits (e.g.,