STB PDF

Plastics Determination of the aerobic biodegradation of plastic materials exposed to seawater Part 2: Method by measuring the oxygen demand in closed respirometer (ISO 23977-2:2020). Original standard UNE-EN ISO 23977-2-2022 in PDF full version. Additional info + preview on request

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Optics and photonics. Lasers and laser-related equipment. Measurement of phase retardation of optical components for polarized laser radiation. Original standard UNE-EN ISO 24013-2023 in PDF full version. Additional info + preview on request

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Leather. Chemical, physical, mechanical and fastness tests. Position and preparation of specimens for testing. Original standard UNE-EN ISO 2418-2023 in PDF full version. Additional info + preview on request

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Fine ceramics (advanced ceramics, advanced technical ceramics). Test method for fracture toughness of monolithic ceramics at room temperature by chevron-notched beam (CNB) method. Original standard UNE-EN ISO 24370-2023 in PDF full version. Additional info + preview on request

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Geometrical product specifications (GPS). Surface texture: Areal. Calibration, adjustment and verification of areal topography measuring instruments. Original standard UNE-EN ISO 25178-700-2023 in PDF full version. Additional info + preview on request

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Conveyor belts. Adhesion between constitutive elements. Test methods. Original standard UNE-EN ISO 252-2023 in PDF full version. Additional info + preview on request

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