Testing Framework
An international technical specification establishes a standardized method for determining the amount of color that transfers from a leather surface to a dry or wet cloth. Manufacturers of high end leather garments use ISO/TS 20433 to quantify the resistance of their products to friction. This document outlines the mechanical parameters required to simulate real-world wear patterns consistently across different laboratories.
Apparatus Setting
Friction is applied using a specific tool known as a crockmeter equipped with a standard white rubbing cloth. Under ISO/TS 20433, the machine must operate at a defined downward pressure and a fixed number of cycles. These constraints ensure that a score of three in a European lab means the same thing as a score of three in an Asian export hub.
Grading Scale
Assessment involves a visual comparison between the stained cloth and a standard grey scale for staining. Compliance with ISO/TS 20433 helps buyers determine if a leather jacket will ruin a light colored shirt worn underneath. Ratings are given from one to five, with higher numbers indicating better color retention under stress.
Material Scope
Applicability of this standard covers all types of processed leather regardless of the source animal. Since it is a technical specification, ISO/TS 20433 serves as a consensus document that mills and buyers reference during quality disputes. Verification is mandatory for most retail contracts involving accessories and footwear.
