STM PDF

Optics and photonics - Test method for refractive index of optical glasses - Part 2- V-block refractometer method. Original standard ISO 21395-2-2022 in PDF full version. Additional info + preview on request

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Hard coal and coke - Guidance to the inspection of mechanical sampling systems. Original standard ISO 21398-2019 in PDF full version. Additional info + preview on request

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Documentation - Abstracts for publications and documentation. Original standard ISO 214-1976 in PDF full version. Additional info + preview on request

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Continuous mechanical handling equipment for loose bulk materials - Apron conveyors. Original standard ISO 2140-1975 in PDF full version. Additional info + preview on request

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Pulp - Determination of cellulose nanocrystal sulfur and sulfate half-ester content. Original standard ISO 21400-2018 in PDF full version. Additional info + preview on request

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Tourism and related services - Sustainability management system for accommodation establishments - Requirements. Original standard ISO 21401-2018 in PDF full version. Additional info + preview on request

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