<h1>New SION for PVC Leather Drop Cloths: Material Specs and Adjustments for Coating Weight Variations</h1> The Standard Input-Output Norms (SION) for the production of drop cloths made from PVC leather cloth or foam leather cloth, both single and double-sided, with a coating weight of 1000 grams per square meter, plus or minus 5%. It specifies the required materials and their quantities, including PVC resin, various catalysts, solvents, plasticizers, pigments, and other additives. It also includes guidelines for adjusting the quantities of certain materials based on variations in coating weight. The document provides detailed measurements for each component necessary for manufacturing the specified product.