In this unification, the procedure for determining the resistance of glass reduced to powder to attack by water at 100 °C is established. The resistance is determined by the quantity of alkali, expressed as sodium oxide, extracted and referred to the unit weight of the glass.
UNI 5302-1963 history
1963UNI 5302-1963 Glass products for technology and hygiene. Determination of hydrolytic strength of glass powder at 100°C