BS 1524:1955

Five types of material distinguished by flow temperature. Limits for fines and impurities, moisture content, impact strength, tensile strength, deflection under load, viscosity change on moulding, moisture absorption, loss in weight by leaching and by heating, rate of burning, liability to bleeding of colour, removal of colour by rubbing, electric strength, heat stability of colour, colour fastness to light, softening point. Test methods appended.