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Overview ISO 4047:1977 defines a standardized laboratory procedure for determining sulphated total ash and sulphated water-insoluble ash in leather. The method is applicable to all types of leather a…
Overview EN ISO 4047:1998 (ISO 4047:1977) specifies a laboratory method for determining the sulphated total ash and sulphated water‑insoluble ash of leather. Published by CEN/ISO and applicable to al…
