What is tensile strength of Roland XR 640 printed 45WF? What is tensile strength of Roland XR 640 printed 45WF? Physical Properties of 45WF -Ecosolvent Printed ID UT (lbf) 10% Mod (lbf_ %E 1 10.2 8.0 98 2 10.5 7.8 114 3 11.1 7.7 130 Ave 10.6 7.8 114 StDev 0.5 0.13 16.5