Standardized Measurement
Standardized testing protocols define the terminal and spatial conventions for measuring coating thickness on metallic or inorganic surfaces. In garment trim sourcing, ISO 2064 provides the foundational rules for specifying where and how to measure protective plating on metal buttons, zippers, and rivets. This standard ensures that buyers and suppliers use identical definitions when evaluating hardware corrosion resistance.
Spatial Convention
Defining the significant surface of a garment accessory prevents disputes about finish quality and wear resistance. Testing must focus on areas where the coating is essential for serviceability or appearance, ignoring deep recesses or non-functional edges. The average thickness is determined by taking multiple local measurements within a specified reference area.
Mill Verification
Quality control laboratories at accessory factories measure these plating depths using non-destructive methods like X-ray spectrometry or microscopic examination of cross-sections. Meeting these specifications is crucial for garments destined for heavy wash treatments or high-humidity environments, where thin coatings would lead to rust staining on the fabric. Clear test protocols ensure that hardware survives the life cycle of the garment without degrading the textile body.
Testing Limit
Polymer-based coatings and paint finishes on textile hardware fall outside the scope of these testing rules. Plastic snaps or painted buttons are evaluated under separate test methods.
