Proportion EtOH / Vol.% Contact angle / degree standard deviation / degree 0 168.34872 5.83836 10 172.27262 6.76801 20 167.45281 6.98941 30 143.98954 3.02671 40 132.35874 5.99011 50 123.71025 6.00947 60 108.38712 3.77143 70 33.80779 5.11195 80 17.08518 1.41479 90 0 0 100 0 0