is determined by the moment of force in the plane of the fabric size of the water jet and the time the water jet is in contact with the filling yarn referring now to fig1 the next step in the process is to take the patterned fabric 26 and have this patterned fabric processed by a calender mechanism that is generally indicated by numeral 201 the patterned fabric 26 is placed on supply roll 220 and an unpatterned fabric 226 is placed on supply roll 210 both the patterned fabric 26 and unpatterned fabric 226 are fed into an upper calendering roll 230 and lower calendering roll 232 for good patterning both the patterned fabric 26 and unpatterned fabric 226 should be ribbed since the surface of the upper calendering roll 230 is smooth as well as the surface of lower calendering roll 232 the moire pattern is made by placing these two layers of ribbed fabric 26 and 226 on top of each other so that the ribs of the upper unpatterned fabric 226 are slightly off grain in relation to the lower patterned fabric 26 these true moire patterns are produced when the upper unpatterned fabric 226 is sandwiched with the lower patterned fabric 26 and passed through the calender rolls 230 and 232 at high pressure so that wherever the filling yarns cross a moire pattern is.