Instruction on inspection, laboratory and certification of rubber quality.

The present instruction sets out Laos’s official technical standards for natural rubber, detailing the quality requirements, classification system, and testing procedures that producers must follow. It compiles updates from 2019 to 2025 and defines specifications for various rubber grades such as LSR and TSR. The text explains how rubber should be processed, inspected, and measured in laboratories through tests like Mooney viscosity, ash content, nitrogen level, and impurity analysis. It also outlines factory responsibilities, inspection duties, and certification steps to ensure compliance with national standards. While largely technical, the document also references acceptable contamination limits and safe processing conditions. Overall, it provides a regulatory framework to ensure consistent, high quality natural rubber production in Laos.