BS EN ISO 307:2019 pdf free.Plastics - Polyamides - Determination of viscosity number. Transfer 50 ml of m-cresol (5.1.3) into a weighing flask (6.4) and add with a glass pipette (6.5) 0,14 ml of orthophosphoric acid (5.1.Z). Close the flask and stir with a magnetic stirrer for 30 min at 100 °C. Add the solution to approximately 800 ml of...
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