Standard Test Method for Resistance of Medical Face Masks to Penetration by Synthetic Blood (Horizontal Projection of Fixed Volume at a Known Velocity) subscription-only BS ISO 13653:2019 specifies graphs

BS ISO 13653:2019 specifies graphs and formulas which are given to show the degree to which parabolic and spherical reflectors depart from the usual paraxial irradiance formulas when an extended source or a small source is placed near the aperture

This document specifies requirements and test methods for divers’ watches and for saturation divers’ watches for use in deep diving (see Annex A which deals with watches for saturation diving)

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What is ISO 1628-5 - Viscosity of polymers using capillary viscometers about

the precision thereof has not been established1

Standard Test Method for Resistance of Medical Face Masks to Penetration by Synthetic Blood (Horizontal Projection of Fixed Volume at a Known Velocity) subscription-only BS ISO 13653:2019 specifies graphs1. Scope 1. 1 This test method is used to evaluate the resistance of medical face masks to penetration by the impact of a small volume (~2 mL) of a high velocity stream of synthetic blood. Medical face mask pass fail determinations are based on visual detection of synthetic blood penetration.