Standards World

ISO 24016:2020 pdf free download - Jewellery and precious metals - Grading polished diamonds一 Terminology, classification and test methods. The aim of a standard for grading unmounted polished diamonds is to set rules for determining with maximum...

ISO 23950:1998 pdf free download - Information and documentation- Information retrieval (Z39.50)一Application service definition and protocol specification. Element set name-- An element specification in the form of a primitive name. Element specification- -An instance of an element...

ISO 24076:2021 pdf free download - Plastics - Polypropylene (PP)一 Determination of isotactic index by low-resolution nuclear magnetic resonance spectrometry. The LR-NMR method in this document is a relative method established with Iso 9113 as the absolute...

ISO 23776:2021 pdf free download - Meat and meat products一 Determination of total phosphorous content. Dissolve in water 479,4 mg of potassium dihydrogen phosphate (KH2PO4), previously dried for 3 h at (103 ± 2) °C and allowed...

ISO 23767:2021 pdf free download - Children's furniture一Mattresses for cots and cribs一Safety requirements and test methods. Where projections, parts or assemblies are rigidly mounted on a rod or shaft designed to rotate together with the projections, parts...

ISO 23738:2021 pdf free download - Fine ceramics (advanced ceramics, advanced technical ceramics)一 Measurement method of spectral reflectance of fine ceramic thin films under humid conditions. Fine ceramic thin films are used in many optical applications, such...

ISO 23694:2021 pdf free download - Wrought magnesium and magnesium alloys一Extruded rods/bars and tubes. 6.2 Test methods 6.2.1 Chemical composition Methods of analysis shall be agreed between the supplier and the purchaser. In case of dispute concerning...

ISO 23662:2021 pdf free download - Definitions and technical criteria for foods and food ingredients suitable for vegetarians or vegans and for labelling and claims. The purpose of this document is to provide the technical criteria for...

ISO 23599:2012 pdf free download - Assistive products for blind and vision- impaired persons一Tactile walking surface indicators. The purpose of this International Standard is to create requirements for tactile walking surface indicators (TWSIs) for blind or vision-impaired...

ISO 23550:2011 pdf free download - Safety and control devices for gas burners and gas-burning appliances一 General requirements. ISO 23550 provides general requirements for controls and safety devices for gas burners and gas-burning appliances and is intended...