... -40°C,4hNo crackle-40°C,4hNo crackle-40°C,4hNo crackle4Rate of change of dimension under heat ageing(80±2) °C,24h,≤1.5 ... %(80±2) °C,24h,≤1.0%(80±2) °C,(1344±1)h≤0.5%(80±2) °C,(1344±1)h≤0.5 ... of rollThe roll breaks beyond joint7Absorbent—(70±1) °C,168±1h, ±3.0%(23±2) °C,168±1h, ±3.0%8Penetration resistance0.5Kg ...