Photography. Processing chemicals. Specification for ammonium thiosulfate solution Ingestion-build-81111 This part of EN 71

This part of EN 71 specifies requirements and test methods for the substances and materials used in chemical toys (sets) other than experimental sets

BS EN 1020 is a European Standard which specifies the requirements and test methods for the safety and efficiency of nondomestic gas-fired air heaters having a fan to assist the transportation of combustion air and/or flue gases

which can be supplemented and tailored to suit industry-specific requirements

The test results provide indications on the quality and lifetime of the pavement or road subject to traffic loads

Photography. Processing chemicals. Specification for ammonium thiosulfate solution Ingestion-build-81111 This part of EN 711 Scope This International Standard establishes criteria for the purity of photographic grade ammonium thiosulfate solution and specifies the tests to be used to determine the purity.